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      id="Fact000013">Fund summary</rr:RiskReturnHeading>
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      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000014">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000015">&lt;p id="xdx_A8C_err--ObjectivePrimaryTextBlock_zRToQb3TrUV3" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000016">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000017">&lt;p id="xdx_A82_err--ExpenseNarrativeTextBlock_zhkBRPLFrZG9" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000018">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000020"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000021"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000022"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000023"
      unitRef="Ratio">0.0068</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000024"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000025"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000026"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000027"
      unitRef="Ratio">0.0093</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000028">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000029">&lt;p id="xdx_A86_err--ExpenseExampleNarrativeTextBlock_zLAd1z1gV0jK" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="0"
      id="Fact000031"
      unitRef="USD">69</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="0"
      id="Fact000032"
      unitRef="USD">218</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="0"
      id="Fact000033"
      unitRef="USD">379</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="0"
      id="Fact000034"
      unitRef="USD">847</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="0"
      id="Fact000035"
      unitRef="USD">95</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="0"
      id="Fact000036"
      unitRef="USD">296</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="0"
      id="Fact000037"
      unitRef="USD">515</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="0"
      id="Fact000038"
      unitRef="USD">1143</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000039">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000040">&lt;p id="xdx_A8C_err--PortfolioTurnoverTextBlock_zpQGXbjAFgzR" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90A_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member_zuORF8xtSL0n"&gt;10%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      decimals="INF"
      id="Fact000041"
      unitRef="Ratio">0.10</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000042">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000043">&lt;p id="xdx_A88_err--StrategyNarrativeTextBlock_zUuPhyyaL0r_zYp0axJMXgz7" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks (growth or value stocks or both) of U.S. companies of any size that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets (plus the amount of any borrowings for investment purposes) in equity investments, including common stocks, preferred stocks, convertible securities, warrants, American Depositary Receipts (ADRs) and Global Depositary Receipts (GDRs). This policy may be changed only after 60 days&#x2019; notice to shareholders.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000044">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000045">&lt;p id="xdx_A86_err--RiskTextBlock_za9V5ZeG6xmL" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_901_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zm7XT119pKB2"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.
        These risks are generally greater for small and midsize companies.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program.&lt;span id="xdx_908_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zC7bEqqUEziG"&gt; An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_rr_RiskLoseMoneyMember"
      id="Fact000046">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000047"> An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000048">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000049">&lt;p id="xdx_A82_err--PerformanceNarrativeTextBlock_z2al07CBEcRJ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_905_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member_zAmdlU8k1JqC"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance. Before June 30, 2018, the fund was managed with a materially different
        investment strategy and may have achieved materially different performance results under its current investment strategy from
        that shown for periods before this date. Performance for classes other than those shown may vary from the performance shown to
        the extent the expenses for those classes differ. The fund makes updated performance information, including its current net asset
        value per share, available at &lt;span id="xdx_90B_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member_zXIjhJbO3TdP"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90A_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003880Member_zlSl3y2cqerq"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future&lt;/span&gt;. &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000050">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000051">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000052">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000053">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000056"
      unitRef="Ratio">-0.0196</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000058"
      unitRef="Ratio">0.1234</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000060"
      unitRef="Ratio">0.2314</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000062"
      unitRef="Ratio">-0.0744</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000064"
      unitRef="Ratio">0.3200</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000066"
      unitRef="Ratio">0.1764</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000068"
      unitRef="Ratio">0.3132</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000070"
      unitRef="Ratio">-0.1554</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000072"
      unitRef="Ratio">0.2836</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000074"
      unitRef="Ratio">0.2732</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000075">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000076">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      decimals="INF"
      id="Fact000077"
      unitRef="Ratio">0.2134</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000078">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000079">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      decimals="INF"
      id="Fact000080"
      unitRef="Ratio">-0.2284</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000081">Average
                                            annual total returns 
        (for
        periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000083"
      unitRef="Ratio">0.2732</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000084"
      unitRef="Ratio">0.1635</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010855Member"
      decimals="INF"
      id="Fact000085"
      unitRef="Ratio">0.1345</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000086"
      unitRef="Ratio">0.2696</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000087"
      unitRef="Ratio">0.1606</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_C000010856Member"
      decimals="INF"
      id="Fact000088"
      unitRef="Ratio">0.1317</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000089"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000090"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003880Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000091"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003880Member"
      id="Fact000092">&lt;p id="xdx_A83_err--PerformanceTableClosingTextBlock_zslgLuQIh1j0" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important
                                            data provider notices and terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;.
                                            All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000094">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000095">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000096">&lt;p id="xdx_A85_err--ObjectivePrimaryTextBlock_zzGUuX5jo7Ro" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks as high a level
        of current income as the Investment Manager (as defined below) believes is consistent with preservation of capital.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000097">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000098">&lt;p id="xdx_A8C_err--ExpenseNarrativeTextBlock_zS3BzgWubdVz" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000099">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000101"
      unitRef="Ratio">0.0053</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000102"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000103"
      unitRef="Ratio">0.0030</rr:OtherExpensesOverAssets>
    <rr:AcquiredFundFeesAndExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000104"
      unitRef="Ratio">0.0001</rr:AcquiredFundFeesAndExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000105"
      unitRef="Ratio">0.0084</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000106"
      unitRef="Ratio">-0.0003</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000107"
      unitRef="Ratio">0.0081</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000108"
      unitRef="Ratio">0.0053</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000109"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000110"
      unitRef="Ratio">0.0030</rr:OtherExpensesOverAssets>
    <rr:AcquiredFundFeesAndExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000111"
      unitRef="Ratio">0.0001</rr:AcquiredFundFeesAndExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000112"
      unitRef="Ratio">0.0109</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000113"
      unitRef="Ratio">-0.0003</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000114"
      unitRef="Ratio">0.0106</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000116">April 30, 2026</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000117">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000118">&lt;p id="xdx_A88_err--ExpenseExampleNarrativeTextBlock_zeaTVU0tNYV3" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The following hypothetical
        example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example
        does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000
        in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a
        5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each
        period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.&lt;/span&gt;&lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="0"
      id="Fact000120"
      unitRef="USD">83</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="0"
      id="Fact000121"
      unitRef="USD">266</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="0"
      id="Fact000122"
      unitRef="USD">465</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="0"
      id="Fact000123"
      unitRef="USD">1038</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="0"
      id="Fact000124"
      unitRef="USD">108</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="0"
      id="Fact000125"
      unitRef="USD">345</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="0"
      id="Fact000126"
      unitRef="USD">600</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="0"
      id="Fact000127"
      unitRef="USD">1330</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000128">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000129">&lt;p id="xdx_A8B_err--PortfolioTurnoverTextBlock_zEcMVjvyXPc1" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_908_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member_zk8HTiIAB7il"&gt;926&lt;/span&gt;%.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      decimals="INF"
      id="Fact000130"
      unitRef="Ratio">9.26</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000131">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000132">&lt;p id="xdx_A8C_err--StrategyNarrativeTextBlock_zXR9MRmR0WX0" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in bonds
        that are securitized debt instruments (such as mortgage-backed investments) and related derivative instruments, and other obligations
        of companies and governments worldwide, including bank loans that are either investment-grade or below-investment-grade in quality
        (sometimes referred to as &#x201c;junk bonds&#x201d;) and have intermediate- to long-term maturities (three years or longer). The
        fund currently has significant investment exposure to residential and commercial mortgage-backed securities.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We may consider, among other
        factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell
        investments. We typically use to a significant extent derivatives, including credit default swaps, interest rate swaps, total
        return swaps, to-be-announced (&#x201c;TBA&#x201d;) commitments, futures, options and swaptions, including on mortgage-backed securities
        and indices, and certain foreign currency transactions and credit default, total return and interest rate swap contracts for
        both hedging and non-hedging purposes, including to obtain or adjust exposure to mortgage-backed securities.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000133">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000134">&lt;p id="xdx_A82_err--RiskTextBlock_zTr04D34l9TH" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_903_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zB14Jn9vnFHv"&gt;It is important to understand that you can lose money by investing in the fund&lt;/span&gt;.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds,
        and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund&#x2019;s investments), which
        can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage-backed
        investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they may increase in
        value less than other bonds when interest rates decline and decline in value more than other bonds when interest rates rise.
        We may have to invest the proceeds from prepaid investments, including mortgage-backed investments, in other investments with
        less attractive terms and yields. The fund&#x2019;s investments in mortgage-backed securities, and in certain other securities
        and derivatives, may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund currently has significant investment exposure to privately issued residential and commercial mortgage-backed securities and mortgage-backed securities issued or guaranteed by the U.S. government or its agencies or instrumentalities, which may make the fund&#x2019;s net asset value more susceptible to economic, market, political and other developments affecting the residential and commercial real estate markets and the servicing of mortgage loans secured by real estate properties. During periods of difficult economic conditions, delinquencies and losses on commercial mortgage-backed investments in particular generally increase, including as a result of the effects of those conditions on commercial real estate markets, the ability of commercial tenants to make loan payments, and the ability of a property to attract and retain commercial tenants.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund expects to engage in frequent trading. Funds with high turnover may incur higher transaction costs than funds with relatively lower turnover, which may detract from performance.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_900_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zIuzMwldk50n"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_rr_RiskLoseMoneyMember"
      id="Fact000135">It is important to understand that you can lose money by investing in the fund</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000136">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000137">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000138">&lt;p id="xdx_A8D_err--PerformanceNarrativeTextBlock_zycETvZjEP1G" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_905_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member_zb6xjubViWcu"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_905_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member_zt47jQm0pzUl"&gt;www.franklintempleton.com.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90F_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003893Member_zlOf68sMY1Qf"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future&lt;/span&gt;. &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000139">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000140">www.franklintempleton.com.</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000141">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000142">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000145"
      unitRef="Ratio">-0.0232</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000147"
      unitRef="Ratio">0.0576</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000149"
      unitRef="Ratio">0.0742</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000151"
      unitRef="Ratio">-0.0074</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000153"
      unitRef="Ratio">0.1156</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000155"
      unitRef="Ratio">-0.0076</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000157"
      unitRef="Ratio">-0.0673</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000159"
      unitRef="Ratio">-0.0206</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000161"
      unitRef="Ratio">0.0501</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000163"
      unitRef="Ratio">0.0609</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000164">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000165">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      decimals="INF"
      id="Fact000166"
      unitRef="Ratio">0.0680</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000167">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000168">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      decimals="INF"
      id="Fact000169"
      unitRef="Ratio">-0.1279</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000170">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000172"
      unitRef="Ratio">0.0609</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000173"
      unitRef="Ratio">0.0020</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010881Member"
      decimals="INF"
      id="Fact000174"
      unitRef="Ratio">0.0218</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000175"
      unitRef="Ratio">0.0576</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000176"
      unitRef="Ratio">-0.0004</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_C000010882Member"
      decimals="INF"
      id="Fact000177"
      unitRef="Ratio">0.0195</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000178"
      unitRef="Ratio">0.0125</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000179"
      unitRef="Ratio">-0.0033</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000180"
      unitRef="Ratio">0.0135</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_ICEBofAUSTreasuryBillIndexMember"
      decimals="INF"
      id="Fact000181"
      unitRef="Ratio">0.0529</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_ICEBofAUSTreasuryBillIndexMember"
      decimals="INF"
      id="Fact000182"
      unitRef="Ratio">0.0247</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003893Member_custom_ICEBofAUSTreasuryBillIndexMember"
      decimals="INF"
      id="Fact000183"
      unitRef="Ratio">0.0178</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003893Member"
      id="Fact000184">&lt;p id="xdx_A8A_err--PerformanceTableClosingTextBlock_zM3lAhPDnjXA" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000186">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000187">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000188">&lt;p id="xdx_A8F_err--ObjectivePrimaryTextBlock_zdkfZkgNrx3p" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks long-term capital
        appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000189">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000190">&lt;p id="xdx_A84_err--ExpenseNarrativeTextBlock_z5PIVhUKS6kr" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000191">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000193"
      unitRef="Ratio">0.0091</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000194"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000195"
      unitRef="Ratio">0.0061</rr:OtherExpensesOverAssets>
    <rr:AcquiredFundFeesAndExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000196"
      unitRef="Ratio">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000197"
      unitRef="Ratio">0.0154</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000198"
      unitRef="Ratio">-0.0043</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000199"
      unitRef="Ratio">0.0111</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000200"
      unitRef="Ratio">0.0091</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000201"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000202"
      unitRef="Ratio">0.0061</rr:OtherExpensesOverAssets>
    <rr:AcquiredFundFeesAndExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000203"
      unitRef="Ratio">0.0002</rr:AcquiredFundFeesAndExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000204"
      unitRef="Ratio">0.0179</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000205"
      unitRef="Ratio">-0.0043</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000206"
      unitRef="Ratio">0.0136</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000208">April 30, 2026</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000209">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000210">&lt;p id="xdx_A81_err--ExpenseExampleNarrativeTextBlock_z9JMAsutKfDs" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="0"
      id="Fact000212"
      unitRef="USD">113</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="0"
      id="Fact000213"
      unitRef="USD">444</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="0"
      id="Fact000214"
      unitRef="USD">798</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="0"
      id="Fact000215"
      unitRef="USD">1796</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="0"
      id="Fact000216"
      unitRef="USD">138</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="0"
      id="Fact000217"
      unitRef="USD">521</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="0"
      id="Fact000218"
      unitRef="USD">929</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="0"
      id="Fact000219"
      unitRef="USD">2068</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000220">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000221">&lt;p id="xdx_A8E_err--PortfolioTurnoverTextBlock_zzt1ASbxlTie" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90F_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member_zUZ4ycOaTxdr"&gt;64%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      decimals="INF"
      id="Fact000222"
      unitRef="Ratio">0.64</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000223">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000224">&lt;p id="xdx_A8C_err--StrategyNarrativeTextBlock_zTulHHRrE2tQ" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in common
        stocks (growth or value stocks or both) of emerging market companies of any size that we believe have favorable investment potential.
        For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the
        company. We may also consider other factors that we believe will cause the stock price to rise. Under normal circumstances, we
        invest at least 80% of the fund&#x2019;s net assets in equity securities of emerging market companies. This policy may be changed
        only after 60 days&#x2019; notice to shareholders.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Emerging markets include countries
        in the MSCI Emerging Market Index or that we consider to be emerging markets based on our evaluation of their level of economic
        development or the size and nature of their securities markets. We may consider, among other factors, a company&#x2019;s valuation,
        financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends
        when deciding whether to buy or sell investments. We may also use derivatives, such as futures, options, certain foreign currency
        transactions, warrants and swap contracts, for both hedging and non-hedging purposes.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund is &#x201c;non-diversified,&#x201d;
        which means it may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d; fund. The fund
        expects to invest in a limited number of issuers.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000225">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000226">&lt;p id="xdx_A80_err--RiskTextBlock_zVWAcqmCWMBs" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_906_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member__rr--RiskAxis__rr--RiskLoseMoneyMember_z44yGyO2JhVa"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.
        These risks are generally greater for small and midsize companies.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;From time to time, the fund
        may invest a significant portion of its assets in companies in one or more related industries, sectors or geographic regions,
        such as Asian or Pacific Basin countries, which would make the fund more vulnerable to adverse developments affecting those industries,
        sectors or regions.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90F_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member__rr--RiskAxis__rr--RiskNondiversifiedStatusMember_zCrtRjLEgskj"&gt;The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_900_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zgut5SoLh9Jh"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;
        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_rr_RiskLoseMoneyMember"
      id="Fact000227">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_rr_RiskNondiversifiedStatusMember"
      id="Fact000228">The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000229">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000230">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000231">&lt;p id="xdx_A89_err--PerformanceNarrativeTextBlock_z9TxewHkwmUH" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_904_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member_z19LDL5VqpgA"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance, an additional index with characteristics relevant to the fund and the
        Putnam VT Emerging Markets Equity Linked Benchmark, which represents the performance of the MSCI EAFE Growth Index-NR through
        April 29, 2020, and the performance of the MSCI Emerging Markets Index-NR thereafter. Before April 30, 2020, the fund was managed
        with a different investment strategy and may have achieved different performance results under its current investment strategy
        from that shown for periods before this date. Performance for classes other than those shown may vary from the performance shown
        to the extent the expenses for those classes differ. The fund makes updated performance information, including its current net
        asset value per share, available at &lt;span id="xdx_90C_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member_z4tBmIKeoNwk"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_906_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003879Member_zihCYczMusPp"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt;&lt;/i&gt;&lt;/span&gt;&lt;i&gt; &lt;/i&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000232">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000233">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000234">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000235">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000238"
      unitRef="Ratio">0.0133</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000240"
      unitRef="Ratio">-0.0646</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000242"
      unitRef="Ratio">0.3537</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000244"
      unitRef="Ratio">-0.1840</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000246"
      unitRef="Ratio">0.2521</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000248"
      unitRef="Ratio">0.2825</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000250"
      unitRef="Ratio">-0.0398</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000252"
      unitRef="Ratio">-0.2724</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000254"
      unitRef="Ratio">0.1163</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000256"
      unitRef="Ratio">0.1610</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000257">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000258">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      decimals="INF"
      id="Fact000259"
      unitRef="Ratio">0.2139</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000260">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000261">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      decimals="INF"
      id="Fact000262"
      unitRef="Ratio">-0.2147</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000263">Average
annual total returns 
 (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000265"
      unitRef="Ratio">0.1610</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000266"
      unitRef="Ratio">0.0304</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010853Member"
      decimals="INF"
      id="Fact000267"
      unitRef="Ratio">0.0429</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000268"
      unitRef="Ratio">0.1577</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000269"
      unitRef="Ratio">0.0277</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_C000010854Member"
      decimals="INF"
      id="Fact000270"
      unitRef="Ratio">0.0403</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000271"
      unitRef="Ratio">0.0553</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000272"
      unitRef="Ratio">0.0410</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000273"
      unitRef="Ratio">0.0480</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIEmergingMarketsIndexNRMember"
      decimals="INF"
      id="Fact000274"
      unitRef="Ratio">0.0750</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIEmergingMarketsIndexNRMember"
      decimals="INF"
      id="Fact000275"
      unitRef="Ratio">0.0170</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_MSCIEmergingMarketsIndexNRMember"
      decimals="INF"
      id="Fact000276"
      unitRef="Ratio">0.0364</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_PVTEMELBMember"
      decimals="INF"
      id="Fact000277"
      unitRef="Ratio">0.0750</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_PVTEMELBMember"
      decimals="INF"
      id="Fact000278"
      unitRef="Ratio">0.0305</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003879Member_custom_PVTEMELBMember"
      decimals="INF"
      id="Fact000279"
      unitRef="Ratio">0.0535</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003879Member"
      id="Fact000280">&lt;p id="xdx_A87_err--PerformanceTableClosingTextBlock_zWBKsBbqZGsR" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000282">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000283">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000284">&lt;p id="xdx_A8B_err--ObjectivePrimaryTextBlock_zS86ldYSu3UD" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000285">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000286">&lt;p id="xdx_A89_err--ExpenseNarrativeTextBlock_zeXuGHaekhw5" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000287">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000289"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000290"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000291"
      unitRef="Ratio">0.0017</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000292"
      unitRef="Ratio">0.0085</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000293"
      unitRef="Ratio">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000294"
      unitRef="Ratio">0.0080</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000295"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000296"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000297"
      unitRef="Ratio">0.0017</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000298"
      unitRef="Ratio">0.0110</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000299"
      unitRef="Ratio">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000300"
      unitRef="Ratio">0.0105</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000302">April 30, 2026</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000303">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000304">&lt;p id="xdx_A8D_err--ExpenseExampleNarrativeTextBlock_zDGb4GImNP4N" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="0"
      id="Fact000306"
      unitRef="USD">82</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="0"
      id="Fact000307"
      unitRef="USD">266</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="0"
      id="Fact000308"
      unitRef="USD">466</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="0"
      id="Fact000309"
      unitRef="USD">1044</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="0"
      id="Fact000310"
      unitRef="USD">107</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="0"
      id="Fact000311"
      unitRef="USD">345</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="0"
      id="Fact000312"
      unitRef="USD">601</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="0"
      id="Fact000313"
      unitRef="USD">1336</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000314">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000315">&lt;p id="xdx_A8D_err--PortfolioTurnoverTextBlock_z1rgLOnApbhl" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_902_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member_zUOlmS9wUwu7"&gt;32%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      decimals="INF"
      id="Fact000316"
      unitRef="Ratio">0.32</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000317">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000318">&lt;p id="xdx_A86_err--StrategyNarrativeTextBlock_zcEgDDtOoXY1" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in common
        stocks (growth or value stocks or both) of companies of any size outside the United States that we believe have favorable investment
        potential. We consider a company to be located outside the United States if the company&#x2019;s securities trade outside the
        United States, the company is headquartered or organized outside the United States or the company derives a majority of its revenues
        or profits outside the United States. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in equity
        investments. This policy may be changed only after 60 days&#x2019; notice to shareholders. The fund&#x2019;s equity investments
        may include common stocks, preferred stocks, convertible securities, warrants, American Depositary Receipts (&#x201c;ADRs&#x201d;)
        and Global Depositary Receipts (&#x201c;GDRs&#x201d;). We invest in both developed countries and in emerging markets.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We may consider, among other
        factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future
        earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also consider other factors that
        we believe will cause the stock price to rise. We may also use derivatives, such as futures, options, warrants and swap contracts,
        including credit default swaps and credit default swap indexes, for both hedging and non-hedging purposes. We expect from time
        to time to invest in credit default swaps and/or credit default swap indexes to hedge against equity market risk.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund is &#x201c;non-diversified,&#x201d; which means it may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d; fund. The fund expects to invest in a limited number of issuers.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000319">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000320">&lt;p id="xdx_A8B_err--RiskTextBlock_ztBVqNMkvpol" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_900_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zVewR2uf9FCG"&gt;It is important to understand that you can lose money by investing in the fund&lt;/span&gt;.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. The fund will be more susceptible to these risks than other funds because it invests in a limited
        number of issuers, industries or sectors, and the fund may perform poorly as a result of adverse developments affecting those
        issuers, industries or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Investments focused in a single region may be affected by common economic forces and other factors. In addition, events in any one country within the region may impact the other countries or the region as a whole. Because the fund currently invests, and may in the future invest, significantly in European and Asian companies, the fund is particularly susceptible to economic, political, regulatory and other events or conditions affecting issuers in Europe and Asia. European financial markets have in recent years experienced increased volatility due to concerns with some countries&#x2019; high levels of sovereign debt, budget deficits, and unemployment. Asia includes countries in various stages of economic development, from emerging market economies to the highly developed economy of Japan. Some parts of Asia may be subject to a greater degree of economic, political and social instability than is the case in the United States.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90F_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member__rr--RiskAxis__rr--RiskNondiversifiedStatusMember_zgMDkSVEi6EG"&gt;The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives, including
        credit default swaps and credit default swap indexes, may increase the risks of investing in the fund by increasing investment
        exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability
        to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations.
        The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The
        value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation
        between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility
        in the value of derivatives could adversely impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also
        subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a
        derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal
        documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Investments in credit default
        swaps or credit default swap indexes are subject to special risks, including the risk that the investment may expire worthless
        and only generate income in the event of an actual default by the issuer(s) of the underlying obligation(s) (or, as applicable,
        a credit downgrade or other indication of financial instability) and the risk that the counterparty may fail to satisfy its payment
        obligations to the fund in the event of a default.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_907_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_z3btgOgsl9A3"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_rr_RiskLoseMoneyMember"
      id="Fact000321">It is important to understand that you can lose money by investing in the fund</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_rr_RiskNondiversifiedStatusMember"
      id="Fact000322">The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000323">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000324">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000325">&lt;p id="xdx_A86_err--PerformanceNarrativeTextBlock_zaQyhzEmhEHN" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90E_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member_z2IuaYZ7zGl1"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and the Putnam VT Focused International Equity Linked Benchmark, which
        represents the performance of the MSCI World Index-NR through April 29, 2021, and the performance of the MSCI ACWI ex USA Index-NR
        thereafter. Before April 30, 2021, the fund was managed with a materially different investment strategy and may have achieved
        materially different performance results under its current investment strategy from that shown for the periods before this date.
        Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes
        differ. The fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_908_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member_zrSFPMIMRoYZ"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90F_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003897Member_znHW1KAvVUdU"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000326">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000327">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000328">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000329">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000332"
      unitRef="Ratio">-0.0149</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000334"
      unitRef="Ratio">0.0137</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000336"
      unitRef="Ratio">0.2871</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000338"
      unitRef="Ratio">-0.1221</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000340"
      unitRef="Ratio">0.2692</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000342"
      unitRef="Ratio">0.1032</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000344"
      unitRef="Ratio">0.1284</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000346"
      unitRef="Ratio">-0.1799</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000348"
      unitRef="Ratio">0.1956</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000350"
      unitRef="Ratio">0.0363</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000351">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000352">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      decimals="INF"
      id="Fact000353"
      unitRef="Ratio">0.2273</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000354">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000355">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      decimals="INF"
      id="Fact000356"
      unitRef="Ratio">-0.2451</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000357">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000359"
      unitRef="Ratio">0.0363</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000360"
      unitRef="Ratio">0.0481</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010889Member"
      decimals="INF"
      id="Fact000361"
      unitRef="Ratio">0.0612</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000362"
      unitRef="Ratio">0.0330</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000363"
      unitRef="Ratio">0.0454</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_C000010890Member"
      decimals="INF"
      id="Fact000364"
      unitRef="Ratio">0.0585</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000365"
      unitRef="Ratio">0.0553</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000366"
      unitRef="Ratio">0.0410</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_MSCIACWIexUSAIndexMember"
      decimals="INF"
      id="Fact000367"
      unitRef="Ratio">0.0480</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_PVTFocusedInternationalEquityLinkedBenchmarkMember"
      decimals="INF"
      id="Fact000368"
      unitRef="Ratio">0.0553</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_PVTFocusedInternationalEquityLinkedBenchmarkMember"
      decimals="INF"
      id="Fact000369"
      unitRef="Ratio">0.0566</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003897Member_custom_PVTFocusedInternationalEquityLinkedBenchmarkMember"
      decimals="INF"
      id="Fact000370"
      unitRef="Ratio">0.0719</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003897Member"
      id="Fact000371">&lt;p id="xdx_A8C_err--PerformanceTableClosingTextBlock_z9qZyf8RgcbN" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000373">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000374">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000375">&lt;p id="xdx_A86_err--ObjectivePrimaryTextBlock_z7XSAKOkYZ51" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks to provide
        a balanced investment composed of a well-diversified portfolio of stocks and bonds which produce both capital growth and current
        income.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000376">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000377">&lt;p id="xdx_A88_err--ExpenseNarrativeTextBlock_zp9wNJ3sA00X" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000378">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000380"
      unitRef="Ratio">0.0051</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000381"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000382"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000383"
      unitRef="Ratio">0.0065</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000384"
      unitRef="Ratio">0.0051</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000385"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000386"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000387"
      unitRef="Ratio">0.0090</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000388">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000389">&lt;p id="xdx_A81_err--ExpenseExampleNarrativeTextBlock_zfA6w7NBfgNI" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="0"
      id="Fact000391"
      unitRef="USD">66</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="0"
      id="Fact000392"
      unitRef="USD">208</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="0"
      id="Fact000393"
      unitRef="USD">362</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="0"
      id="Fact000394"
      unitRef="USD">810</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="0"
      id="Fact000395"
      unitRef="USD">92</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="0"
      id="Fact000396"
      unitRef="USD">287</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="0"
      id="Fact000397"
      unitRef="USD">498</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="0"
      id="Fact000398"
      unitRef="USD">1108</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000399">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000400">&lt;p id="xdx_A81_err--PortfolioTurnoverTextBlock_zetxQDG7BzIE" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_901_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member_zVtb3xQvtPGo"&gt;95%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      decimals="INF"
      id="Fact000401"
      unitRef="Ratio">0.95</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000402">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000403">&lt;p id="xdx_A8E_err--StrategyNarrativeTextBlock_zO2Sykkelq7Q" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in a combination of bonds and common stocks (growth or value stocks or both) of large U.S. companies, with a greater focus on common stocks. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors that we believe will cause the stock price to rise. We buy bonds of governments and private companies that are mostly investment-grade in quality with intermediate- to long-term maturities (three years or longer). We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments, and, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed-income investments. We may also use derivatives, such as futures, options, warrants and swap contracts, for both hedging and non-hedging purposes.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000404">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000405">&lt;p id="xdx_A8D_err--RiskTextBlock_zqjeJHAhaJnq" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90A_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zptQEB4uEYfX"&gt;It is important to understand that you can lose money by investing in the fund&lt;/span&gt;.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds,
        and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as &#x201c;junk bonds&#x201d;), which
        can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_907_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zCWcvA6i5cFR"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;
        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_rr_RiskLoseMoneyMember"
      id="Fact000406">It is important to understand that you can lose money by investing in the fund</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000407">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000408">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000409">&lt;p id="xdx_A88_err--PerformanceNarrativeTextBlock_z1KFo7BY65kh" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_901_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member_zmeibPNYQLYB"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance, an additional index with characteristics relevant to the fund and the
        George Putnam Blended Index, which is comprised of 60% S&amp;amp;P 500 Index and 40% of Bloomberg U.S. Aggregate Bond Index. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_90A_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member_zuPSJcvraaQz"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90E_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003895Member_zgsnvoenXE39"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000410">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000411">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000412">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000413">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000416"
      unitRef="Ratio">-0.0096</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000418"
      unitRef="Ratio">0.0840</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000420"
      unitRef="Ratio">0.1529</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000422"
      unitRef="Ratio">-0.0282</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000424"
      unitRef="Ratio">0.2435</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000426"
      unitRef="Ratio">0.1561</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000428"
      unitRef="Ratio">0.1428</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000430"
      unitRef="Ratio">-0.1582</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000432"
      unitRef="Ratio">0.2026</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000434"
      unitRef="Ratio">0.1694</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000435">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000436">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      decimals="INF"
      id="Fact000437"
      unitRef="Ratio">0.1444</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000438">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000439">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      decimals="INF"
      id="Fact000440"
      unitRef="Ratio">-0.1164</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000441">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000443"
      unitRef="Ratio">0.1694</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000444"
      unitRef="Ratio">0.0936</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010885Member"
      decimals="INF"
      id="Fact000445"
      unitRef="Ratio">0.0887</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000446"
      unitRef="Ratio">0.1673</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000447"
      unitRef="Ratio">0.0911</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_C000010886Member"
      decimals="INF"
      id="Fact000448"
      unitRef="Ratio">0.0860</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000449"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000450"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000451"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000452"
      unitRef="Ratio">0.0125</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000453"
      unitRef="Ratio">-0.0033</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000454"
      unitRef="Ratio">0.0135</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_GPBlendedIndexMember"
      decimals="INF"
      id="Fact000455"
      unitRef="Ratio">0.1514</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_GPBlendedIndexMember"
      decimals="INF"
      id="Fact000456"
      unitRef="Ratio">0.0896</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_GPBlendedIndexMember"
      decimals="INF"
      id="Fact000457"
      unitRef="Ratio">0.0870</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact000458"
      unitRef="Ratio">0.2502</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact000459"
      unitRef="Ratio">0.1453</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003895Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact000460"
      unitRef="Ratio">0.1310</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003895Member"
      id="Fact000461">&lt;p id="xdx_A8C_err--PerformanceTableClosingTextBlock_z8DsRjyr6EM2" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000463">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000464">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000465">&lt;p id="xdx_A83_err--ObjectivePrimaryTextBlock_zagTmdl9KIuN" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks long-term return
        consistent with preservation of capital.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000466">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000467">&lt;p id="xdx_A8E_err--ExpenseNarrativeTextBlock_z57z9iuUt4YJ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000468">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000470"
      unitRef="Ratio">0.0058</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000471"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000472"
      unitRef="Ratio">0.0032</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000473"
      unitRef="Ratio">0.0090</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000474"
      unitRef="Ratio">-0.0004</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000475"
      unitRef="Ratio">0.0086</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000476"
      unitRef="Ratio">0.0058</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000477"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000478"
      unitRef="Ratio">0.0032</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000479"
      unitRef="Ratio">0.0115</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000480"
      unitRef="Ratio">-0.0004</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000481"
      unitRef="Ratio">0.0111</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000483">April 30, 2026</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000484">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000485">&lt;p id="xdx_A8C_err--ExpenseExampleNarrativeTextBlock_ze0kksShSLT8" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="0"
      id="Fact000487"
      unitRef="USD">88</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="0"
      id="Fact000488"
      unitRef="USD">283</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="0"
      id="Fact000489"
      unitRef="USD">495</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="0"
      id="Fact000490"
      unitRef="USD">1104</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="0"
      id="Fact000491"
      unitRef="USD">113</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="0"
      id="Fact000492"
      unitRef="USD">361</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="0"
      id="Fact000493"
      unitRef="USD">629</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="0"
      id="Fact000494"
      unitRef="USD">1394</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000495">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000496">&lt;p id="xdx_A80_err--PortfolioTurnoverTextBlock_zV0IvlwDodCx" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_903_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member_znvZufCAkbLc"&gt;234&lt;/span&gt;%.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      decimals="INF"
      id="Fact000497"
      unitRef="Ratio">2.34</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000498">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000499">&lt;p id="xdx_A8B_err--StrategyNarrativeTextBlock_zTkBnEUZiAbt" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest a majority of the fund&#x2019;s assets in a diversified portfolio of equity securities (growth or value stocks or both) of both U.S. and foreign companies of any size. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell equity investments. We also invest in a diversified portfolio of fixed-income investments, including both U.S. and foreign government obligations, corporate obligations and securitized debt instruments (such as mortgage-backed investments). We may consider, among other factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell fixed income investments. We may also select other investments that do not fall within these asset classes. We may also use to a significant extent derivatives, such as futures, options, certain foreign currency transactions, warrants and swap contracts, for both hedging and non-hedging purposes.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000500">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000501">&lt;p id="xdx_A87_err--RiskTextBlock_zJbcgk9xOvMr" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90C_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member__rr--RiskAxis__rr--RiskLoseMoneyMember_z6IR4bXj1RhV"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our allocation of assets among asset classes may hurt performance, and our efforts to diversify risk through the use of leverage and allocation decisions may not be successful. If the quantitative models or data that are used in managing the fund prove to be incorrect or incomplete, investment decisions made in reliance on the models or data may not produce the desired results and the fund may realize losses.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.
        These risks are generally greater for small and midsize companies.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds,
        and credit risk is generally greater for below-investment-grade bonds (sometimes referred to as &#x201c;junk bonds&#x201d;), which
        can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage-
        and asset-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they
        may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest
        rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in
        other investments with less attractive terms and yields. The fund&#x2019;s investments in mortgage- and asset-backed securities,
        and in certain other securities and derivatives, may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_90A_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zfEVZFC7HtWT"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_rr_RiskLoseMoneyMember"
      id="Fact000502">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000503">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000504">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000505">&lt;p id="xdx_A8E_err--PerformanceNarrativeTextBlock_z3qlNaILwOXm" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90B_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member_zbfnuCBSmI4u"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and the Putnam Balanced Blended Benchmark, which is comprised of 50% Russell
        3000&lt;sup&gt;&#xae;&lt;/sup&gt; Index, 35% Bloomberg U.S. Aggregate Index, 10% MSCI EAFE Index-NR and 5% JPMorgan Developed High Yield Index.
        Performance for classes other than those shown may vary from the performance shown to the extent the expenses for those classes
        differ. The fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_907_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member_zJ8P1vu5kE8s"&gt;www.franklintempleton.com.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_904_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003896Member_zbxjZMlbMG63"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000506">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000507">www.franklintempleton.com.</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000508">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000509">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000512"
      unitRef="Ratio">0.0042</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000514"
      unitRef="Ratio">0.0698</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000516"
      unitRef="Ratio">0.1567</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000518"
      unitRef="Ratio">-0.0702</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000520"
      unitRef="Ratio">0.1742</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000522"
      unitRef="Ratio">0.1258</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000524"
      unitRef="Ratio">0.1425</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000526"
      unitRef="Ratio">-0.1582</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000528"
      unitRef="Ratio">0.1778</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000530"
      unitRef="Ratio">0.1663</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000531">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000532">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      decimals="INF"
      id="Fact000533"
      unitRef="Ratio">0.1290</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000534">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000535">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      decimals="INF"
      id="Fact000536"
      unitRef="Ratio">-0.1277</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000537">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000539"
      unitRef="Ratio">0.1663</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000540"
      unitRef="Ratio">0.0827</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010887Member"
      decimals="INF"
      id="Fact000541"
      unitRef="Ratio">0.0727</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000542"
      unitRef="Ratio">0.1636</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000543"
      unitRef="Ratio">0.0800</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_C000010888Member"
      decimals="INF"
      id="Fact000544"
      unitRef="Ratio">0.0700</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000545"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000546"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact000547"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_PutnamBalancedBlendedIndexMember"
      decimals="INF"
      id="Fact000548"
      unitRef="Ratio">0.1280</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_PutnamBalancedBlendedIndexMember"
      decimals="INF"
      id="Fact000549"
      unitRef="Ratio">0.0765</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003896Member_custom_PutnamBalancedBlendedIndexMember"
      decimals="INF"
      id="Fact000550"
      unitRef="Ratio">0.0769</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003896Member"
      id="Fact000551">&lt;p id="xdx_A8E_err--PerformanceTableClosingTextBlock_zetRsQECSzBX" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000553">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000554">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000555">&lt;p id="xdx_A85_err--ObjectivePrimaryTextBlock_zzo6E3ASdMk_zN1j58AF3egG" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000556">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000557">&lt;p id="xdx_A82_err--ExpenseNarrativeTextBlock_zQHS4MxfUtCZ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000558">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000560"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000561"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000562"
      unitRef="Ratio">0.0012</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000563"
      unitRef="Ratio">0.0073</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000564"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000565"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000566"
      unitRef="Ratio">0.0012</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000567"
      unitRef="Ratio">0.0098</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000568">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000569">&lt;p id="xdx_A8D_err--ExpenseExampleNarrativeTextBlock_zJ0Eup82ZExa" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="0"
      id="Fact000571"
      unitRef="USD">75</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="0"
      id="Fact000572"
      unitRef="USD">233</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="0"
      id="Fact000573"
      unitRef="USD">406</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="0"
      id="Fact000574"
      unitRef="USD">906</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="0"
      id="Fact000575"
      unitRef="USD">100</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="0"
      id="Fact000576"
      unitRef="USD">312</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="0"
      id="Fact000577"
      unitRef="USD">542</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="0"
      id="Fact000578"
      unitRef="USD">1201</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000579">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000580">&lt;p id="xdx_A89_err--PortfolioTurnoverTextBlock_zO9lBA42oeWW" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90E_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member_zbU5B3tAh42a"&gt;44%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      decimals="INF"
      id="Fact000581"
      unitRef="Ratio">0.44</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000582">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000583">&lt;p id="xdx_A8F_err--StrategyNarrativeTextBlock_zNlZglKRrN4d" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
For this non-diversified fund concentrating in the health care industries, we invest mainly in common stocks (growth or value stocks or both) of large and midsize companies worldwide that we believe have favorable investment potential. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in securities of companies in the health care industries. This policy may be changed only after 60 days&#x2019; notice to shareholders. Potential investments include companies that manufacture health care supplies or provide health care-related services, and companies in the research, development, production and marketing of pharmaceuticals and biotechnology products. We may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also consider other factors that we believe will cause the stock price to rise. We may also use derivatives, such as certain foreign currency transactions, futures, options, warrants and swap contracts, for both hedging and non-hedging purposes, and may engage in short sales of securities. For example, we typically use foreign currency forward contracts in connection with the fund&#x2019;s investments in foreign securities in order to hedge the fund&#x2019;s currency exposure relative to the fund&#x2019;s benchmark index.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The use of the term &#x201c;global&#x201d; in the fund&#x2019;s name is meant to emphasize that we look for investment opportunities on a worldwide basis and that our investment strategies are not constrained by the countries or regions in which companies are located. Under normal market conditions, the fund intends to invest in at least five different countries and at least 40% of its net assets in securities of foreign companies (or, if less, at least the percentage of net assets that is ten percentage points less than the percentage of the fund&#x2019;s benchmark represented by foreign companies, as determined by the providers of the benchmark).
        &lt;/p&gt;
       </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000584">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000585">&lt;p id="xdx_A88_err--RiskTextBlock_zY0dtSycsCGd" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span id="xdx_902_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zeAqgLYpPyTa"&gt;It
        is important to understand that you can lose money by investing in the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.
        These risks are generally greater for small and midsize companies.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The health care industries may be affected by product obsolescence, dependence on patents and intellectual property rights, expenses and losses from product liability and similar claims, changes in government programs or regulatory requirements (including approval policies for drugs, medical devices or procedures), and pricing pressures (including as a result of increased competition, changes in governmental and private reimbursement rates and payment systems, or other reforms).
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our policy of concentrating
        on a limited group of industries and the fund&#x2019;s &#x201c;non-diversified&#x201d; status, which means the fund may invest a
        greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d; fund, can increase the fund&#x2019;s vulnerability
        to adverse developments affecting a single industry, country or issuer, which may result in greater losses and volatility for
        the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our use of short selling may result in losses if the securities appreciate in value.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_908_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_z0uS9ImHXn4l"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_rr_RiskLoseMoneyMember"
      id="Fact000586">It
        is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000587">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000588">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000589">&lt;p id="xdx_A89_err--PerformanceNarrativeTextBlock_zyvcO9MJlB9a" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90F_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member_zorWpqehYmKh"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund&lt;/span&gt;. The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_900_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member_zm2bezI7E9k9"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_903_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003874Member_zELDMlvEPL3h"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000590">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000591">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000592">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000593">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000596"
      unitRef="Ratio">0.0806</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000598"
      unitRef="Ratio">-0.1114</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000600"
      unitRef="Ratio">0.1560</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000602"
      unitRef="Ratio">-0.0029</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000604"
      unitRef="Ratio">0.3058</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000606"
      unitRef="Ratio">0.1647</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000608"
      unitRef="Ratio">0.1977</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000610"
      unitRef="Ratio">-0.0444</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000612"
      unitRef="Ratio">0.0939</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000614"
      unitRef="Ratio">0.0170</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000615">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000616">2019-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      decimals="INF"
      id="Fact000617"
      unitRef="Ratio">0.1758</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000618">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000619">2024-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      decimals="INF"
      id="Fact000620"
      unitRef="Ratio">-0.1223</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000621">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000623"
      unitRef="Ratio">0.0170</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000624"
      unitRef="Ratio">0.0820</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010843Member"
      decimals="INF"
      id="Fact000625"
      unitRef="Ratio">0.0792</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000626"
      unitRef="Ratio">0.0143</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000627"
      unitRef="Ratio">0.0794</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_C000010844Member"
      decimals="INF"
      id="Fact000628"
      unitRef="Ratio">0.0765</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MXCIWNDIVINDEXNRMember"
      decimals="INF"
      id="Fact000629"
      unitRef="Ratio">0.1749</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MXCIWNDIVINDEXNRMember"
      decimals="INF"
      id="Fact000630"
      unitRef="Ratio">0.1006</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MXCIWNDIVINDEXNRMember"
      decimals="INF"
      id="Fact000631"
      unitRef="Ratio">0.0923</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MSCIWorldHealthCareIndexMember"
      decimals="INF"
      id="Fact000632"
      unitRef="Ratio">0.0113</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MSCIWorldHealthCareIndexMember"
      decimals="INF"
      id="Fact000633"
      unitRef="Ratio">0.0618</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003874Member_custom_MSCIWorldHealthCareIndexMember"
      decimals="INF"
      id="Fact000634"
      unitRef="Ratio">0.0733</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003874Member"
      id="Fact000635">&lt;p id="xdx_A82_err--PerformanceTableClosingTextBlock_zCPRVurOxfTS" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000637">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000638">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000639">&lt;p id="xdx_A81_err--ObjectivePrimaryTextBlock_zdqMTIQ2YvPM" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks as high a rate
        of current income as the Investment Manager (as defined below) believes is consistent with preservation of capital and maintenance
        of liquidity.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000640">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000641">&lt;p id="xdx_A8C_err--ExpenseNarrativeTextBlock_zzppMF7lqU1B" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000642">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000644"
      unitRef="Ratio">0.0027</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000645"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000646"
      unitRef="Ratio">0.0017</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000647"
      unitRef="Ratio">0.0044</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000648"
      unitRef="Ratio">0.0027</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000649"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000650"
      unitRef="Ratio">0.0017</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000651"
      unitRef="Ratio">0.0069</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000652">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000653">&lt;p id="xdx_A86_err--ExpenseExampleNarrativeTextBlock_z5RDhWkHRcGn" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="0"
      id="Fact000655"
      unitRef="USD">45</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="0"
      id="Fact000656"
      unitRef="USD">141</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="0"
      id="Fact000657"
      unitRef="USD">246</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="0"
      id="Fact000658"
      unitRef="USD">555</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="0"
      id="Fact000659"
      unitRef="USD">70</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="0"
      id="Fact000660"
      unitRef="USD">221</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="0"
      id="Fact000661"
      unitRef="USD">384</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="0"
      id="Fact000662"
      unitRef="USD">859</rr:ExpenseExampleYear10>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000663">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000664">&lt;p id="xdx_A8B_err--StrategyNarrativeTextBlock_ziX3bOAZUXe9" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest at least 99.5 percent of the fund&#x2019;s total assets in cash, U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities or cash. We invest mainly in debt securities that are obligations of the U.S. government, its agencies and instrumentalities and accordingly are backed by the full faith and credit of the United States (e.g., U.S. Treasury bills) or by the credit of a federal agency or government-sponsored entity (e.g.,securities issued by Fannie Mae and Freddie Mac). The U.S. government securities in which we invest may also include variable and floating rate instruments and when-issued and delayed delivery securities (i.e., payment or delivery of the securities occurs at a future date for a predetermined price). Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in U.S. government securities and repurchase agreements that are fully collateralized by U.S. government securities. This policy may be changed only after 60 days&#x2019; notice to shareholders. The securities purchased by the fund are subject to quality, maturity, diversification and other requirements pursuant to rules promulgated by the Securities and Exchange Commission. We may consider, among other factors, credit and interest rate risks and characteristics of the issuer or counterparty, as well as general market conditions, when deciding whether to buy or sell investments.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000665">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000666">&lt;p id="xdx_A81_err--RiskTextBlock_zRelT0OHc98_zigZy8rjRrj8" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90B_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zAQGirKMDDEa"&gt;It is important to understand
        that you can lose money by investing in the fund.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The values of money market investments usually rise and fall in response to changes in interest rates. Interest rate risk is generally lowest for investments with short maturities (a significant part of the fund&#x2019;s investments). Changes in the financial condition of an issuer or counterparty, changes in specific economic or political conditions that affect a particular type of issuer, and changes in general economic or political conditions can increase the risk of default by an issuer or counterparty, which can affect a security&#x2019;s or instrument&#x2019;s credit quality or value. Certain securities in which the fund may invest, including securities issued by certain U.S. government agencies and U.S. government sponsored enterprises, are not guaranteed by the U.S. government or supported by the full faith and credit of the United States.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively impact the fund.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may not achieve its
        goal, and it is not intended to be a complete investment program. You could lose money by investing in the fund.&lt;span id="xdx_901_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member__rr--RiskAxis__rr--RiskMoneyMarketFundMayNotPreserveDollarMember_zX4IDSsH97Ei"&gt; Although the
        fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.&lt;/span&gt; &lt;span id="xdx_908_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zyyrur1SfAWf"&gt;An investment in the
        fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government
        agency&lt;/span&gt;. &lt;span id="xdx_90E_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member__rr--RiskAxis__rr--RiskMoneyMarketFundSponsorMayNotProvideSupportMember_zqFLMmYzkIM6"&gt;The fund&#x2019;s sponsor is not required to reimburse the fund for losses, and you should not expect that the sponsor
        will provide financial support to the fund at any time, including during periods of market stress.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_rr_RiskLoseMoneyMember"
      id="Fact000667">It is important to understand
        that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_rr_RiskMoneyMarketFundMayNotPreserveDollarMember"
      id="Fact000668"> Although the
        fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000669">An investment in the
        fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government
        agency</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_rr_RiskMoneyMarketFundSponsorMayNotProvideSupportMember"
      id="Fact000670">The fund&#x2019;s sponsor is not required to reimburse the fund for losses, and you should not expect that the sponsor
        will provide financial support to the fund at any time, including during periods of market stress.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000671">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000672">&lt;p id="xdx_A80_err--PerformanceNarrativeTextBlock_z7c6pvjbBvfG" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_909_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member_zUA7DqU8043j"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year. Performance for classes other than those shown may vary from the performance
        shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current
        net asset value, available at &lt;span id="xdx_90F_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member_zrpJagbYfyN4"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_904_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003882Member_zzorUJLZtf29"&gt;The fund&#x2019;s past performance
        is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000673">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000674">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000675">The fund&#x2019;s past performance
        is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000676">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000679"
      unitRef="Ratio">0.0001</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000681"
      unitRef="Ratio">0.0001</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000683"
      unitRef="Ratio">0.0047</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000685"
      unitRef="Ratio">0.0143</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000687"
      unitRef="Ratio">0.0181</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000689"
      unitRef="Ratio">0.0024</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000691"
      unitRef="Ratio">0.0001</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000693"
      unitRef="Ratio">0.0129</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000695"
      unitRef="Ratio">0.0470</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000697"
      unitRef="Ratio">0.0493</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000698">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000699">2024-09-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      decimals="INF"
      id="Fact000700"
      unitRef="Ratio">0.0125</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000701">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000702">2022-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      decimals="INF"
      id="Fact000703"
      unitRef="Ratio">0.0000</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003882Member"
      id="Fact000704">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000706"
      unitRef="Ratio">0.0493</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000707"
      unitRef="Ratio">0.0221</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010859Member"
      decimals="INF"
      id="Fact000708"
      unitRef="Ratio">0.0148</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000709"
      unitRef="Ratio">0.0467</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000710"
      unitRef="Ratio">0.0207</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003882Member_custom_C000010860Member"
      decimals="INF"
      id="Fact000711"
      unitRef="Ratio">0.0133</rr:AverageAnnualReturnYear10>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000713">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000714">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000715">&lt;p id="xdx_A85_err--ObjectivePrimaryTextBlock_zJBjdR9SOZ8Q" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks high current
        income. Capital growth is a secondary goal when consistent with achieving high current income.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000716">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000717">&lt;p id="xdx_A82_err--ExpenseNarrativeTextBlock_zzhznsKgMBhZ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000718">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000720"
      unitRef="Ratio">0.0055</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000721"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000722"
      unitRef="Ratio">0.0018</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000723"
      unitRef="Ratio">0.0073</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000724"
      unitRef="Ratio">0.0055</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000725"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000726"
      unitRef="Ratio">0.0018</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000727"
      unitRef="Ratio">0.0098</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000728">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000729">&lt;p id="xdx_A80_err--ExpenseExampleNarrativeTextBlock_zS5rPGHyiwp_zqt8BEhniUsT" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="0"
      id="Fact000731"
      unitRef="USD">75</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="0"
      id="Fact000732"
      unitRef="USD">233</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="0"
      id="Fact000733"
      unitRef="USD">406</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="0"
      id="Fact000734"
      unitRef="USD">906</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="0"
      id="Fact000735"
      unitRef="USD">100</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="0"
      id="Fact000736"
      unitRef="USD">312</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="0"
      id="Fact000737"
      unitRef="USD">542</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="0"
      id="Fact000738"
      unitRef="USD">1201</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000739">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000740">&lt;p id="xdx_A8A_err--PortfolioTurnoverTextBlock_zCJO3ACYRTvD" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_905_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member_z02QwI3SoZO7"&gt;50%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      decimals="INF"
      id="Fact000741"
      unitRef="Ratio">0.50</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000742">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000743">&lt;p id="xdx_A8E_err--StrategyNarrativeTextBlock_zJaF0gxyRDtF" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in bonds that are obligations of U.S. companies, are below investment-grade in quality (sometimes referred to as &#x201c;junk bonds&#x201d;), and have intermediate- to long-term maturities (three years or longer). Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in securities rated below investment-grade. This policy may be changed only after 60 days&#x2019; notice to shareholders.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We may also invest in other
        debt instruments, including loans. We may consider, among other factors, credit, interest rate and prepayment risks, as well
        as general market conditions, when deciding whether to buy or sell investments. We may also use derivatives, such as futures,
        options, certain foreign currency transactions, and credit default swap contracts, for both hedging and non-hedging purposes.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000744">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000745">&lt;p id="xdx_A89_err--RiskTextBlock_zBZsQ5qhvjdt" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_903_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zbIfRVXcCEd1"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds,
        and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund&#x2019;s investments), which
        can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_902_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zm3RWoUYsoNh"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;
        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_rr_RiskLoseMoneyMember"
      id="Fact000746">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000747">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000748">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000749">&lt;p id="xdx_A80_err--PerformanceNarrativeTextBlock_zPpESGnMGWpc" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90A_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member_z9eWmMZL5O2"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund&lt;/span&gt;. The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_901_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member_z9wzW63qQKie"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90A_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003875Member_znxAHUiQpsgi"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000750">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000751">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000752">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000753">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000756"
      unitRef="Ratio">-0.0514</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000758"
      unitRef="Ratio">0.1566</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000760"
      unitRef="Ratio">0.0722</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000762"
      unitRef="Ratio">-0.0359</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000764"
      unitRef="Ratio">0.1455</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000766"
      unitRef="Ratio">0.0550</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000768"
      unitRef="Ratio">0.0520</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000770"
      unitRef="Ratio">-0.1137</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000772"
      unitRef="Ratio">0.1229</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000774"
      unitRef="Ratio">0.0819</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000775">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000776">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      decimals="INF"
      id="Fact000777"
      unitRef="Ratio">0.0963</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000778">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000779">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      decimals="INF"
      id="Fact000780"
      unitRef="Ratio">-0.1309</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000781">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000783"
      unitRef="Ratio">0.0819</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000784"
      unitRef="Ratio">0.0363</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010845Member"
      decimals="INF"
      id="Fact000785"
      unitRef="Ratio">0.0450</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000786"
      unitRef="Ratio">0.0786</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000787"
      unitRef="Ratio">0.0338</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_C000010846Member"
      decimals="INF"
      id="Fact000788"
      unitRef="Ratio">0.0425</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000789"
      unitRef="Ratio">0.0125</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000790"
      unitRef="Ratio">-0.0033</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000791"
      unitRef="Ratio">0.0135</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_JPMDevelopedHYIndexMember"
      decimals="INF"
      id="Fact000792"
      unitRef="Ratio">0.0868</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_JPMDevelopedHYIndexMember"
      decimals="INF"
      id="Fact000793"
      unitRef="Ratio">0.0432</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003875Member_custom_JPMDevelopedHYIndexMember"
      decimals="INF"
      id="Fact000794"
      unitRef="Ratio">0.0533</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003875Member"
      id="Fact000795">&lt;p id="xdx_A83_err--PerformanceTableClosingTextBlock_zMIkbvf9nK74" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000797">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000798">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000799">&lt;p id="xdx_A8A_err--ObjectivePrimaryTextBlock_ziotYNeMn5Zy" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks high current
        income consistent with what the Investment Manager (as defined below) believes to be prudent risk.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000800">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000801">&lt;p id="xdx_A8E_err--ExpenseNarrativeTextBlock_zWaU02okXzBS" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000802">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000804"
      unitRef="Ratio">0.0038</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000805"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000806"
      unitRef="Ratio">0.0022</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000807"
      unitRef="Ratio">0.0060</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000808"
      unitRef="Ratio">0.0038</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000809"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000810"
      unitRef="Ratio">0.0022</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000811"
      unitRef="Ratio">0.0085</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000812">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000813">&lt;p id="xdx_A81_err--ExpenseExampleNarrativeTextBlock_zKrr3fDIZozO" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="0"
      id="Fact000815"
      unitRef="USD">61</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="0"
      id="Fact000816"
      unitRef="USD">192</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="0"
      id="Fact000817"
      unitRef="USD">335</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="0"
      id="Fact000818"
      unitRef="USD">750</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="0"
      id="Fact000819"
      unitRef="USD">87</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="0"
      id="Fact000820"
      unitRef="USD">271</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="0"
      id="Fact000821"
      unitRef="USD">471</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="0"
      id="Fact000822"
      unitRef="USD">1049</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000823">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000824">&lt;p id="xdx_A89_err--PortfolioTurnoverTextBlock_zclwcuwi2iXE" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_902_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member_zIBrWlTDjFo5"&gt;461&lt;/span&gt;%.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      decimals="INF"
      id="Fact000825"
      unitRef="Ratio">4.61</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000826">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000827">&lt;p id="xdx_A86_err--StrategyNarrativeTextBlock_zQXGtZ4rqJfz" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in bonds
        that are securitized debt instruments (such as mortgage-backed investments) and related derivative instruments, and other obligations
        of companies and governments worldwide denominated in U.S. dollars or (to a lesser extent) foreign currencies, that are either
        investment-grade or below-investment-grade in quality (sometimes referred to as &#x201c;junk bonds&#x201d;) and that have intermediate-
        to long-term maturities (three years or longer). The fund currently has significant investment exposure to residential and commercial
        mortgage-backed securities.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We may consider, among other
        factors, credit, interest rate and prepayment risks, as well as general market conditions, when deciding whether to buy or sell
        investments. We typically use to a significant extent derivatives, including credit default swaps, interest rate swaps, total
        return swaps, to-be-announced (&#x201c;TBA&#x201d;) commitments, futures, options and swaptions, including on mortgage-backed securities
        and indices, and certain foreign currency transactions for both hedging and non-hedging purposes including to obtain or adjust
        exposure to mortgage-backed investments.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000828">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000829">&lt;p id="xdx_A84_err--RiskTextBlock_zvDWP8XLtrBC" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90C_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member__rr--RiskAxis__rr--RiskLoseMoneyMember_z7u9maMQrYV5"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Interest rate risk is generally greater for longer-term bonds,
        and credit risk is generally greater for below-investment-grade bonds (a significant part of the fund&#x2019;s investments), which
        can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative. Mortgage-
        and asset-backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means that they
        may increase in value less than other bonds when interest rates decline and decline in value more than other bonds when interest
        rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset-backed investments, in
        other investments with less attractive terms and yields. The fund&#x2019;s investments in mortgage- and asset-backed securities,
        and in certain other securities and derivatives, may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund&#x2019;s investment in mortgage-backed securities may make the fund&#x2019;s net asset value more susceptible to economic, market, political and other developments affecting the residential and commercial real estate markets and the servicing of mortgage loans secured by real estate properties. During periods of difficult economic conditions, delinquencies and losses on commercial mortgage-backed investments in particular generally increase, including as a result of the effects of those conditions on commercial real estate markets, the ability of commercial tenants to make loan payments, and the ability of a property to attract and retain commercial tenants.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our use of derivatives may increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g., settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund expects to engage in frequent trading. Funds with high turnover may incur higher transaction costs than funds with relatively lower turnover, which may detract from performance.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;The fund may not achieve its
        goal, and it is not intended to be a complete investment program.&lt;span id="xdx_903_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_z9cIaMhqBii9"&gt; An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;&lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_rr_RiskLoseMoneyMember"
      id="Fact000830">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000831"> An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000832">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000833">&lt;p id="xdx_A8A_err--PerformanceNarrativeTextBlock_zcNtpbwUQxGH" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_909_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member_zX4nHsqBQ6ja"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance. Performance for classes other than those shown may vary from the performance
        shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current
        net asset value per share, available at &lt;span id="xdx_905_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member_zcBh5ufNQlX9"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_905_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003876Member_zXtDT4gtMPm7"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future. &lt;/span&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000834">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000835">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000836">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000837">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000840"
      unitRef="Ratio">-0.0119</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000842"
      unitRef="Ratio">0.0227</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000844"
      unitRef="Ratio">0.0590</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000846"
      unitRef="Ratio">0.0037</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000848"
      unitRef="Ratio">0.1224</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000850"
      unitRef="Ratio">0.0600</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000852"
      unitRef="Ratio">-0.0444</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000854"
      unitRef="Ratio">-0.1348</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000856"
      unitRef="Ratio">0.0496</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000858"
      unitRef="Ratio">0.0256</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000859">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000860">2023-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      decimals="INF"
      id="Fact000861"
      unitRef="Ratio">0.0701</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000862">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000863">2022-06-30</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      decimals="INF"
      id="Fact000864"
      unitRef="Ratio">-0.0577</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000865">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000867"
      unitRef="Ratio">0.0256</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000868"
      unitRef="Ratio">-0.0116</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010847Member"
      decimals="INF"
      id="Fact000869"
      unitRef="Ratio">0.0130</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000870"
      unitRef="Ratio">0.0232</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000871"
      unitRef="Ratio">-0.0141</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_C000010848Member"
      decimals="INF"
      id="Fact000872"
      unitRef="Ratio">0.0103</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000873"
      unitRef="Ratio">0.0125</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000874"
      unitRef="Ratio">-0.0033</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003876Member_custom_BLUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact000875"
      unitRef="Ratio">0.0135</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003876Member"
      id="Fact000876">&lt;p id="xdx_A83_err--PerformanceTableClosingTextBlock_zbVXxrRpqJbY" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000878">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000879">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000880">&lt;p id="xdx_A82_err--ObjectivePrimaryTextBlock_zfObArxUN4BO" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000881">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000882">&lt;p id="xdx_A81_err--ExpenseNarrativeTextBlock_zIJbCm08Ka6g" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000883">Annual Fund Operating Expenses
            (expenses you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000885"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000886"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000887"
      unitRef="Ratio">0.0015</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000888"
      unitRef="Ratio">0.0083</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000889"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000890"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000891"
      unitRef="Ratio">0.0015</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000892"
      unitRef="Ratio">0.0108</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000893">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000894">&lt;p id="xdx_A8B_err--ExpenseExampleNarrativeTextBlock_z014EL1ldQtB" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="0"
      id="Fact000896"
      unitRef="USD">85</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="0"
      id="Fact000897"
      unitRef="USD">265</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="0"
      id="Fact000898"
      unitRef="USD">460</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="0"
      id="Fact000899"
      unitRef="USD">1025</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="0"
      id="Fact000900"
      unitRef="USD">110</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="0"
      id="Fact000901"
      unitRef="USD">343</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="0"
      id="Fact000902"
      unitRef="USD">595</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="0"
      id="Fact000903"
      unitRef="USD">1317</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000904">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000905">&lt;p id="xdx_A8B_err--PortfolioTurnoverTextBlock_zAtEdDOxzukV" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90F_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member_zPjaP2N9nVv1"&gt;80%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      decimals="INF"
      id="Fact000906"
      unitRef="Ratio">0.80</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000907">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000908">&lt;p id="xdx_A8E_err--StrategyNarrativeTextBlock_zG5ig9GqhJ50" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks (growth or value stocks or both) of large and midsize companies outside the United States that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in equity investments. This policy may be changed only after 60 days&#x2019; notice to shareholders. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also consider other factors that we believe will cause the stock price to rise. We invest mainly in developed countries but may invest in emerging markets. We may also use derivatives, such as certain foreign currency transactions, futures, options, warrants and swap contracts, for both hedging and non-hedging purposes. For example, we typically use foreign currency forward contracts in connection with the fund&#x2019;s investments in foreign securities in order to hedge the fund&#x2019;s currency exposure relative to the fund&#x2019;s benchmark index.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000909">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000910">&lt;p id="xdx_A8E_err--RiskTextBlock_zN9tQSSk3ZQI" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_901_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zoUVOJpG8nEe"&gt;It is important to understand that you can lose money by investing in the fund.
&lt;/span&gt;        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Growth stocks may be more susceptible to earnings disappointments, and value stocks may fail to rebound.
        These risks are generally greater for small and midsize companies.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Investments focused in a single region may be affected by common economic forces and other factors. In addition, events in any one country within the region may impact the other countries or the region as a whole. Because the fund currently invests, and may in the future invest, significantly in European and Asian companies, the fund is particularly susceptible to economic, political, regulatory and other events or conditions affecting issuers in Europe and Asia. European financial markets have in recent years experienced increased volatility due to concerns with some countries&#x2019; high levels of sovereign debt, budget deficits, and unemployment. Asia includes countries in various stages of economic development, from emerging market economies to the highly developed economy of Japan. Some parts of Asia may be subject to a greater degree of economic, political and social instability than is the case in the United States.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_90C_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zoq8dpY2W8V2"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_rr_RiskLoseMoneyMember"
      id="Fact000911">It is important to understand that you can lose money by investing in the fund.
</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000912">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000913">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000914">&lt;p id="xdx_A8A_err--PerformanceNarrativeTextBlock_zbOnmhn5JG1J" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_900_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member_zYLEuvIIDcYh"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_90F_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member_zx7Ykh2fOL97"&gt;www.franklintempleton.com.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_907_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003877Member_zHxuTSk5lsB6"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future&lt;/span&gt;. &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000915">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000916">www.franklintempleton.com.</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000917">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000918">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000921"
      unitRef="Ratio">0.0041</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000923"
      unitRef="Ratio">-0.0221</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000925"
      unitRef="Ratio">0.2693</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000927"
      unitRef="Ratio">-0.1895</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000929"
      unitRef="Ratio">0.2555</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000931"
      unitRef="Ratio">0.1235</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000933"
      unitRef="Ratio">0.0909</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000935"
      unitRef="Ratio">-0.1458</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000937"
      unitRef="Ratio">0.1886</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000939"
      unitRef="Ratio">0.0324</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000940">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000941">2022-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      decimals="INF"
      id="Fact000942"
      unitRef="Ratio">0.1724</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000943">Worst calendar quarte</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000944">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      decimals="INF"
      id="Fact000945"
      unitRef="Ratio">-0.2041</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000946">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000948"
      unitRef="Ratio">0.0324</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000949"
      unitRef="Ratio">0.0514</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010849Member"
      decimals="INF"
      id="Fact000950"
      unitRef="Ratio">0.0500</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000951"
      unitRef="Ratio">0.0297</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000952"
      unitRef="Ratio">0.0488</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_C000010850Member"
      decimals="INF"
      id="Fact000953"
      unitRef="Ratio">0.0473</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact000954"
      unitRef="Ratio">0.0553</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact000955"
      unitRef="Ratio">0.0410</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact000956"
      unitRef="Ratio">0.0480</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MSCIEAFEIndexMember"
      decimals="INF"
      id="Fact000957"
      unitRef="Ratio">0.0382</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MSCIEAFEIndexMember"
      decimals="INF"
      id="Fact000958"
      unitRef="Ratio">0.0473</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003877Member_custom_MSCIEAFEIndexMember"
      decimals="INF"
      id="Fact000959"
      unitRef="Ratio">0.0520</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003877Member"
      id="Fact000960">&lt;p id="xdx_A8B_err--PerformanceTableClosingTextBlock_z0nt2cXGpu2i" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000962">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000963">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000964">&lt;p id="xdx_A8E_err--ObjectivePrimaryTextBlock_z90gcOdJpUCS" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital growth.
        Current income is a secondary objective.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000965">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000966">&lt;p id="xdx_A88_err--ExpenseNarrativeTextBlock_zPWNRUVHMeO5" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000967">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact000969"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact000970"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact000971"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact000972"
      unitRef="Ratio">0.0082</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact000973"
      unitRef="Ratio">0.0068</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact000974"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact000975"
      unitRef="Ratio">0.0014</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact000976"
      unitRef="Ratio">0.0107</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000977">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000978">&lt;p id="xdx_A83_err--ExpenseExampleNarrativeTextBlock_zvRGPpci6yfD" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="0"
      id="Fact000980"
      unitRef="USD">84</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="0"
      id="Fact000981"
      unitRef="USD">262</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="0"
      id="Fact000982"
      unitRef="USD">455</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="0"
      id="Fact000983"
      unitRef="USD">1014</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="0"
      id="Fact000984"
      unitRef="USD">109</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="0"
      id="Fact000985"
      unitRef="USD">340</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="0"
      id="Fact000986"
      unitRef="USD">590</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="0"
      id="Fact000987"
      unitRef="USD">1306</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000988">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000989">&lt;p id="xdx_A8C_err--PortfolioTurnoverTextBlock_zANtPgHKvIyw" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_905_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member_zydwH75cqX"&gt;20%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      decimals="INF"
      id="Fact000990"
      unitRef="Ratio">0.20</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000991">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000992">&lt;p id="xdx_A80_err--StrategyNarrativeTextBlock_zfKWFU0o3Wtp" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks of large and midsize companies outside the United States, with a focus on value stocks. Value stocks are those that we believe are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of its stock may rise. We invest mainly in developed countries, but may invest in emerging markets. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also use derivatives, such as certain foreign currency transactions, futures, options, warrants and swap contracts, for both hedging and non-hedging purposes. For example, we typically use foreign currency forward contracts in connection with the fund&#x2019;s investments in foreign securities in order to hedge the fund&#x2019;s currency exposure relative to the fund&#x2019;s benchmark index.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000993">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000994">&lt;p id="xdx_A8E_err--RiskTextBlock_zvykI70h7uF6" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_906_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zphl6vpb6HIh"&gt;It is important to understand that you can lose money by investing in the fund.
&lt;/span&gt;        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Value stocks may fail to rebound, and the market may not favor value-style investing. These risks
        are generally greater for small and midsize companies. From time to time, the fund may invest a significant portion of its assets
        in companies in one or more related industries or sectors, which would make the fund more vulnerable to adverse developments
        affecting those industries or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Investments focused in a single
        region may be affected by common economic forces and other factors. In addition, events in any one country within the region
        may impact the other countries or the region as a whole. Because the fund currently invests, and may in the future invest, significantly
        in European and Asian companies, the fund is particularly susceptible to economic, political, regulatory and other events or
        conditions affecting issuers in Europe and Asia. European financial markets have in recent years experienced increased volatility
        due to concerns with some countries&#x2019; high levels of sovereign debt, budget deficits, and unemployment. Asia includes countries
        in various stages of economic development, from emerging market economies to the highly developed economy of Japan. Some parts
        of Asia may be subject to a greater degree of economic, political and social instability than is the case in the United States.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Our use of derivatives may
        increase the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case
        of many over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_906_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zyMpsJLVnxlf"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_rr_RiskLoseMoneyMember"
      id="Fact000995">It is important to understand that you can lose money by investing in the fund.
</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact000996">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000997">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000998">&lt;p id="xdx_A83_err--PerformanceNarrativeTextBlock_zQpsDTAPrm94" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_903_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member_zwmHcdut43Ba"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_905_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member_zctTqxbXmDnk"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_900_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003878Member_ziOqJdld7Cw5"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact000999">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001000">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001001">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001002">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001005"
      unitRef="Ratio">-0.0171</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001007"
      unitRef="Ratio">0.0128</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001009"
      unitRef="Ratio">0.2495</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001011"
      unitRef="Ratio">-0.1731</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001013"
      unitRef="Ratio">0.2044</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001015"
      unitRef="Ratio">0.0423</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001017"
      unitRef="Ratio">0.1528</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001019"
      unitRef="Ratio">-0.0670</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001021"
      unitRef="Ratio">0.1908</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001023"
      unitRef="Ratio">0.0544</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001024">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001025">2022-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      decimals="INF"
      id="Fact001026"
      unitRef="Ratio">0.2160</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001027">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001028">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      decimals="INF"
      id="Fact001029"
      unitRef="Ratio">-0.2558</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001030">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001032"
      unitRef="Ratio">0.0544</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001033"
      unitRef="Ratio">0.0708</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010851Member"
      decimals="INF"
      id="Fact001034"
      unitRef="Ratio">0.0572</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact001035"
      unitRef="Ratio">0.0521</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact001036"
      unitRef="Ratio">0.0681</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_C000010852Member"
      decimals="INF"
      id="Fact001037"
      unitRef="Ratio">0.0546</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact001038"
      unitRef="Ratio">0.0553</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact001039"
      unitRef="Ratio">0.0410</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MXCIALLCWORLDINDEXNRMember"
      decimals="INF"
      id="Fact001040"
      unitRef="Ratio">0.0480</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MSCIEAFEValueIndexMember"
      decimals="INF"
      id="Fact001041"
      unitRef="Ratio">0.0568</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MSCIEAFEValueIndexMember"
      decimals="INF"
      id="Fact001042"
      unitRef="Ratio">0.0509</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003878Member_custom_MSCIEAFEValueIndexMember"
      decimals="INF"
      id="Fact001043"
      unitRef="Ratio">0.0431</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003878Member"
      id="Fact001044">&lt;p id="xdx_A8B_err--PerformanceTableClosingTextBlock_zOHG0hU2ZLja" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001046">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001047">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001048">&lt;p id="xdx_A8D_err--ObjectivePrimaryTextBlock_zW33KWuvFgU_z0JNHaX0o5wN" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001049">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001050">&lt;p id="xdx_A81_err--ExpenseNarrativeTextBlock_zXgKdG2W3j4_zUbrbgD3FwdC" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001051">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001053"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001054"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001055"
      unitRef="Ratio">0.0010</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001056"
      unitRef="Ratio">0.0064</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001057"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001058"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001059"
      unitRef="Ratio">0.0010</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001060"
      unitRef="Ratio">0.0089</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001061">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001062">&lt;p id="xdx_A83_err--ExpenseExampleNarrativeTextBlock_zJWjlcjCqLHl" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="0"
      id="Fact001064"
      unitRef="USD">65</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="0"
      id="Fact001065"
      unitRef="USD">205</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="0"
      id="Fact001066"
      unitRef="USD">357</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="0"
      id="Fact001067"
      unitRef="USD">798</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="0"
      id="Fact001068"
      unitRef="USD">91</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="0"
      id="Fact001069"
      unitRef="USD">284</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="0"
      id="Fact001070"
      unitRef="USD">493</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="0"
      id="Fact001071"
      unitRef="USD">1096</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001072">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001073">&lt;p id="xdx_A8D_err--PortfolioTurnoverTextBlock_zwIfLn1gm9XZ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_909_err--PortfolioTurnoverRate_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member_zeYLpkUZpcD8"&gt;30%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      decimals="INF"
      id="Fact001074"
      unitRef="Ratio">0.30</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001075">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001076">&lt;p id="xdx_A86_err--StrategyNarrativeTextBlock_zcuq8X132PLG" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks of large U.S. companies, with a focus on growth stocks. Growth stocks are stocks of companies whose earnings are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets (plus the amount of any borrowings for investment purposes) in companies of a size similar to those in the Russell 1000 Growth Index. This policy may be changed only after 60 days&#x2019; notice to shareholders.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund is &#x201c;non-diversified,&#x201d; which means it may invest in a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d; fund.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001077">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001078">&lt;p id="xdx_A88_err--RiskTextBlock_z6Y5jfh2EIT_zb3kDia9Miou" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_900_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zUXw5mqhifn1"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business
        developments or may be subject to special risks that have caused their stocks to be out of favor. Growth stocks may be more susceptible
        to earnings disappointments, and the market may not favor growth-style investing. From time to time, the fund may invest a significant
        portion of its assets in companies in one or more related industries or sectors, which would make the fund more vulnerable to
        adverse developments affecting those companies, industries or sectors. For example, the fund may invest a significant portion
        of its assets in companies in the information technology sector that may be significantly affected by technological obsolescence
        or innovation, short product cycles, falling prices and profits, competitive pressures and general market conditions.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_904_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member__rr--RiskAxis__rr--RiskNondiversifiedStatusMember_zlF3ugyGogx4"&gt;The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_900_err--RiskTextBlock_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zfzDfCV2rrki"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_rr_RiskLoseMoneyMember"
      id="Fact001079">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_rr_RiskNondiversifiedStatusMember"
      id="Fact001080">The fund&#x2019;s &#x201c;non-diversified&#x201d;
        status, which means the fund may invest a greater percentage of its assets in fewer issuers than a &#x201c;diversified&#x201d;
        fund, can increase the fund&#x2019;s vulnerability to adverse developments affecting a single industry, country or issuer, which
        may result in greater losses and volatility for the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001081">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001082">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001083">&lt;p id="xdx_A80_err--PerformanceNarrativeTextBlock_z2NWUWQwAkat" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_902_err--PerformanceInformationIllustratesVariabilityOfReturns_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member_zE82lPILjdgk"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_909_err--PerformanceAvailabilityWebSiteAddress_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member_ztwnjYsKv4E2"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_904_err--PerformancePastDoesNotIndicateFuture_dU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003873Member_z37xuWuqNkKk"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001084">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001085">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001086">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001087">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001090"
      unitRef="Ratio">0.0128</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001092"
      unitRef="Ratio">0.0672</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001094"
      unitRef="Ratio">0.3130</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001096"
      unitRef="Ratio">0.0260</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001098"
      unitRef="Ratio">0.3711</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001100"
      unitRef="Ratio">0.3909</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001102"
      unitRef="Ratio">0.2300</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001104"
      unitRef="Ratio">-0.3036</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001106"
      unitRef="Ratio">0.4489</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001108"
      unitRef="Ratio">0.3371</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001109">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001110">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      decimals="INF"
      id="Fact001111"
      unitRef="Ratio">0.2883</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001112">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001113">2022-06-30</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      decimals="INF"
      id="Fact001114"
      unitRef="Ratio">-0.2206</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001115">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001117"
      unitRef="Ratio">0.3371</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001118"
      unitRef="Ratio">0.1821</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010841Member"
      decimals="INF"
      id="Fact001119"
      unitRef="Ratio">0.1651</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001120"
      unitRef="Ratio">0.3341</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001121"
      unitRef="Ratio">0.1791</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_C000010842Member"
      decimals="INF"
      id="Fact001122"
      unitRef="Ratio">0.1621</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001123"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001124"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001125"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell1000GrowthIndexMember"
      decimals="INF"
      id="Fact001126"
      unitRef="Ratio">0.3336</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell1000GrowthIndexMember"
      decimals="INF"
      id="Fact001127"
      unitRef="Ratio">0.1896</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003873Member_custom_Russell1000GrowthIndexMember"
      decimals="INF"
      id="Fact001128"
      unitRef="Ratio">0.1678</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003873Member"
      id="Fact001129">&lt;p id="xdx_A82_err--PerformanceTableClosingTextBlock_z2mdXJNZWGOC" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001131">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001132">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001133">&lt;p id="xdx_A8C_err--ObjectivePrimaryTextBlock_ztPu8cDun0Et" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital growth
        and current income.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001134">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001135">&lt;p id="xdx_A89_err--ExpenseNarrativeTextBlock_z5XkIfTbhXzW" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001136">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001138"
      unitRef="Ratio">0.0046</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001139"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001140"
      unitRef="Ratio">0.0009</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001141"
      unitRef="Ratio">0.0055</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001142"
      unitRef="Ratio">0.0046</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001143"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001144"
      unitRef="Ratio">0.0009</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001145"
      unitRef="Ratio">0.0080</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001146">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001147">&lt;p id="xdx_A8D_err--ExpenseExampleNarrativeTextBlock_z3c645dOYfYs" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="0"
      id="Fact001149"
      unitRef="USD">56</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="0"
      id="Fact001150"
      unitRef="USD">176</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="0"
      id="Fact001151"
      unitRef="USD">307</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="0"
      id="Fact001152"
      unitRef="USD">689</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="0"
      id="Fact001153"
      unitRef="USD">82</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="0"
      id="Fact001154"
      unitRef="USD">255</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="0"
      id="Fact001155"
      unitRef="USD">444</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="0"
      id="Fact001156"
      unitRef="USD">990</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001157">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001158">&lt;p id="xdx_A8A_err--PortfolioTurnoverTextBlock_zNotRfioLjGf" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_902_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member_z2MxjLjBHFua"&gt;18%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      decimals="INF"
      id="Fact001159"
      unitRef="Ratio">0.18</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001160">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001161">&lt;p id="xdx_A83_err--StrategyNarrativeTextBlock_zG1g6gtUcXIN" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in common
        stocks of U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both.
        Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in large-cap companies, which, for purposes
        of this policy, are of a size similar to those in the Russell 1000 Value Index. This policy may be changed only after 60 days&#x2019;
        notice to shareholders. As of March 31, 2025, the index was composed of companies having market capitalizations of between approximately
        $272.6 million to $1.1 trillion. We may also invest in midsize companies. Value stocks are issued by companies that we believe
        are currently undervalued by the market. If we are correct and other investors ultimately recognize the value of the company,
        the price of its stock may rise. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth
        potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to
        buy or sell investments.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001162">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001163">&lt;p id="xdx_A84_err--RiskTextBlock_zptwCp2ibcNN" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90B_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zldt73yOk808"&gt;It is important to understand
        that you can lose money by investing in the fund.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business
        developments or may be subject to special risks that have caused their stocks to be out of favor. Value stocks may fail to rebound,
        and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies
        of, and the capital resources available at, the companies in which the fund invests.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_905_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zGY9XCJOh9S5"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_rr_RiskLoseMoneyMember"
      id="Fact001164">It is important to understand
        that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001165">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001166">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001167">&lt;p id="xdx_A8A_err--PerformanceNarrativeTextBlock_zIchsaWw6Hb8" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90D_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member_zSjpzBAgn4i8"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_90A_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member_zJikMmXLPZrj"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_902_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003894Member_zUDffIRojCBj"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future. &lt;/span&gt;&lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001168">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001169">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001170">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001171">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001174"
      unitRef="Ratio">-0.0279</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001176"
      unitRef="Ratio">0.1396</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001178"
      unitRef="Ratio">0.1906</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001180"
      unitRef="Ratio">-0.0827</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001182"
      unitRef="Ratio">0.3073</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001184"
      unitRef="Ratio">0.0606</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001186"
      unitRef="Ratio">0.2762</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001188"
      unitRef="Ratio">-0.0287</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001190"
      unitRef="Ratio">0.1592</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001192"
      unitRef="Ratio">0.1946</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001193">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001194">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      decimals="INF"
      id="Fact001195"
      unitRef="Ratio">0.1778</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001196">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001197">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      decimals="INF"
      id="Fact001198"
      unitRef="Ratio">-0.2553</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001199">
            Average annual total returns
            
        
        
(for periods ended 12/31/24)
        </rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001201"
      unitRef="Ratio">0.1946</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001202"
      unitRef="Ratio">0.1273</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010883Member"
      decimals="INF"
      id="Fact001203"
      unitRef="Ratio">0.1116</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001204"
      unitRef="Ratio">0.1914</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001205"
      unitRef="Ratio">0.1245</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_C000010884Member"
      decimals="INF"
      id="Fact001206"
      unitRef="Ratio">0.1088</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001207"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001208"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001209"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell1000ValueIndexMember"
      decimals="INF"
      id="Fact001210"
      unitRef="Ratio">0.1437</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell1000ValueIndexMember"
      decimals="INF"
      id="Fact001211"
      unitRef="Ratio">0.0868</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003894Member_custom_Russell1000ValueIndexMember"
      decimals="INF"
      id="Fact001212"
      unitRef="Ratio">0.0849</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003894Member"
      id="Fact001213">&lt;p id="xdx_A8E_err--PerformanceTableClosingTextBlock_z4WZhlryuiYc" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001215">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001216">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001217">&lt;p id="xdx_A80_err--ObjectivePrimaryTextBlock_zJyRJkX8DfNa" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks as high a level
        of current income as the Investment Manager (as defined below) believes is consistent with preservation of capital.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001218">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001219">&lt;p id="xdx_A83_err--ExpenseNarrativeTextBlock_zfwlvtyurbJh" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001220">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001222"
      unitRef="Ratio">0.0038</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001223"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001224"
      unitRef="Ratio">0.0046</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001225"
      unitRef="Ratio">0.0084</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001226"
      unitRef="Ratio">-0.0034</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001227"
      unitRef="Ratio">0.0050</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001228"
      unitRef="Ratio">0.0038</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001229"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001230"
      unitRef="Ratio">0.0046</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001231"
      unitRef="Ratio">0.0109</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001232"
      unitRef="Ratio">-0.0034</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001233"
      unitRef="Ratio">0.0075</rr:NetExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001235">April 30, 2026</rr:FeeWaiverOrReimbursementOverAssetsDateOfTermination>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001236">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001237">&lt;p id="xdx_A81_err--ExpenseExampleNarrativeTextBlock_zrxM3fLUghFy" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="0"
      id="Fact001239"
      unitRef="USD">51</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="0"
      id="Fact001240"
      unitRef="USD">234</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="0"
      id="Fact001241"
      unitRef="USD">433</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="0"
      id="Fact001242"
      unitRef="USD">1006</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="0"
      id="Fact001243"
      unitRef="USD">77</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="0"
      id="Fact001244"
      unitRef="USD">313</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="0"
      id="Fact001245"
      unitRef="USD">568</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="0"
      id="Fact001246"
      unitRef="USD">1298</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001247">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001248">&lt;p id="xdx_A80_err--PortfolioTurnoverTextBlock_z6aAm7Y0Dzi_znt8FkgOFMuX" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90A_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member_z6nvdhaMWBHg"&gt;1,580&lt;/span&gt;%.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      decimals="INF"
      id="Fact001249"
      unitRef="Ratio">15.80</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001250">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001251">&lt;p id="xdx_A8F_err--StrategyNarrativeTextBlock_zMViacZUGffU" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in mortgages, mortgage-related fixed income securities and related derivatives that are either investment-grade or below-investment-grade in quality (sometimes referred to as &#x201c;junk bonds&#x201d;). Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets (plus any borrowings for investment purposes) in mortgages, mortgage-related fixed income securities and related derivatives (i.e., derivatives used to acquire exposure to, or whose underlying securities are, mortgages or mortgage-related securities). The fund generally uses the net unrealized gain or loss, or market value, of mortgage-related derivatives for purposes of this policy, but may use the notional value of a derivative if that is determined to be a more appropriate measure of the fund&#x2019;s investment exposure. This policy may be changed only after 60 days&#x2019; notice to shareholders.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We expect to invest in mortgage-backed
        investments that are obligations of U.S. government agencies and instrumentalities and accordingly are backed by the full faith
        and credit of the United States (e.g., Ginnie Mae mortgage-backed bonds) as well as in mortgage-backed investments that are backed
        by only the credit of a federal agency or government-sponsored entity (e.g., Fannie Mae and Freddie Mac mortgage-backed bonds),
        and that have short- to long-term maturities.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We also expect to invest in lower-rated, higher-yielding mortgage-backed securities, including non-agency residential mortgage-backed securities (which may be backed by non-qualified or &#x201c;sub-prime&#x201d; mortgages), commercial mortgage-backed securities, and collateralized mortgage obligations (including interest only, principal only, and other prepayment derivatives). Non-agency (i.e., privately issued) securities typically are lower-rated and higher yielding than securities issued or backed by agencies such as Ginnie Mae, Fannie Mae or Freddie Mac. The fund currently has significant investment exposure to commercial mortgage-backed securities. While our emphasis will be on mortgage-backed securities, we may also invest to a lesser extent in other types of asset-backed securities.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We may consider, among other factors, credit, interest rate, prepayment and liquidity risks, as well as general market conditions, when deciding whether to buy or sell investments. We typically use to a significant extent derivatives, including credit default swaps, interest rate swaps, total return swaps, to-be-announced (TBA) commitments, futures, options and swaptions, including on mortgage-backed securities and indices, for both hedging and non-hedging purposes, including to obtain or adjust exposure to mortgage-backed investments.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001252">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001253">&lt;p id="xdx_A87_err--RiskTextBlock_zCDkaXgblSzZ" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90E_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zkPQ2FTNmdof"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector, such as the housing or real estate markets. These and other factors may lead
        to increased volatility and reduced liquidity in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s
        performance, and may exacerbate other risks to which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The risks associated with
        bond investments include interest rate risk, which is the risk that the value of the fund&#x2019;s investments is likely to fall
        if interest rates rise. Bond investments are also subject to credit risk, which is the risk that issuers of the fund&#x2019;s
        investments may default on payment of interest or principal. Bond investments may be more susceptible to downgrades or defaults
        during economic downturns or other periods of economic stress. Default risk is generally higher for non-qualified mortgages.
        Interest rate risk is generally greater for longer-term bonds, and credit risk is generally greater for below-investment-grade
        bonds, which can be more sensitive to changes in markets, credit conditions, and interest rates, and may be considered speculative.
        Mortgage- and asset- backed investments, unlike traditional debt investments, are also subject to prepayment risk, which means
        that they may increase in value less than other bonds when interest rates decline and decline in value more than other bonds
        when interest rates rise. We may have to invest the proceeds from prepaid investments, including mortgage- and asset- backed
        investments, in other investments with less attractive terms and yields. The fund&#x2019;s investments in mortgage- and asset-
        backed securities, and in certain other securities and derivatives, may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund&#x2019;s concentration
        in an industry group composed of privately issued residential and commercial mortgage-backed securities and mortgage-backed securities
        issued or guaranteed by the U.S. government or its agencies or instrumentalities may make the fund&#x2019;s net asset value more
        susceptible to economic, market, political and other developments affecting the residential and commercial real estate markets
        and the servicing of mortgage loans secured by real estate properties. During periods of difficult economic conditions, delinquencies
        and losses on commercial mortgage-backed investments in particular generally increase, including as a result of the effects of
        those conditions on commercial real estate markets, the ability of commercial tenants to make loan payments, and the ability
        of a property to attract and retain commercial tenants.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;Our use of derivatives may increase
        the risks of investing in the fund by increasing investment exposure (which may be considered leverage) or, in the case of many
        over-the-counter instruments, because of the potential inability to terminate or sell derivative positions and the potential
        failure of the other party to the instrument to meet its obligations. The risk of a party failing to meet its obligations may
        increase if the fund has significant exposure to that counterparty. The value of derivatives may move in unexpected ways due
        to unanticipated market movements, the use of leverage, imperfect correlation between the derivative instrument and the reference
        asset, or other factors, especially in unusual market conditions, and volatility in the value of derivatives could adversely
        impact the fund&#x2019;s returns, obligations and exposures. Derivatives are also subject to other risks, including liquidity
        risk (e.g., liquidity demands arising from the requirement to make payments to a derivative counterparty), operational risk (e.g.,
        settlement issues or system failures) and legal risk (e.g., insufficient legal documentation or contract enforceability issues).&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_904_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zfK1JDPCdLV1"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_rr_RiskLoseMoneyMember"
      id="Fact001254">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001255">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001256">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001257">&lt;p id="xdx_A80_err--PerformanceNarrativeTextBlock_zRxMe0zRBQkh" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_901_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member_zhm09ChLVPla"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund. &lt;/span&gt;The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance, an additional index with characteristics relevant to the fund and the
        Putnam Mortgage Securities Linked Benchmark, which represents the performance of the Bloomberg GNMA Index through April 18, 2018,
        and the performance of the Bloomberg U.S. MBS Index thereafter. Performance for classes other than those shown may vary from
        the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information, including
        its current net asset value per share, available at &lt;span id="xdx_90F_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member_zbcQ9QY9zyY3"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_908_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003871Member_zgH2603Kq3jl"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001258">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001259">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001260">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001261">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001264"
      unitRef="Ratio">-0.0033</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001266"
      unitRef="Ratio">0.0036</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001268"
      unitRef="Ratio">0.0227</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001270"
      unitRef="Ratio">-0.0062</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001272"
      unitRef="Ratio">0.1336</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001274"
      unitRef="Ratio">-0.0129</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001276"
      unitRef="Ratio">-0.0343</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001278"
      unitRef="Ratio">-0.0995</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001280"
      unitRef="Ratio">0.0558</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001282"
      unitRef="Ratio">0.0514</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001283">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001284">2023-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      decimals="INF"
      id="Fact001285"
      unitRef="Ratio">0.0797</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001286">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001287">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      decimals="INF"
      id="Fact001288"
      unitRef="Ratio">-0.0991</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001289">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001291"
      unitRef="Ratio">0.0514</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001292"
      unitRef="Ratio">-0.0096</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010837Member"
      decimals="INF"
      id="Fact001293"
      unitRef="Ratio">0.0094</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001294"
      unitRef="Ratio">0.0476</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001295"
      unitRef="Ratio">-0.0124</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_C000010838Member"
      decimals="INF"
      id="Fact001296"
      unitRef="Ratio">0.0067</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact001297"
      unitRef="Ratio">0.0125</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact001298"
      unitRef="Ratio">-0.0033</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSAggregateBondIndexMember"
      decimals="INF"
      id="Fact001299"
      unitRef="Ratio">0.0135</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSMBSIndexMember"
      decimals="INF"
      id="Fact001300"
      unitRef="Ratio">0.0120</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSMBSIndexMember"
      decimals="INF"
      id="Fact001301"
      unitRef="Ratio">-0.0074</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_BUSMBSIndexMember"
      decimals="INF"
      id="Fact001302"
      unitRef="Ratio">0.0091</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_PVTMortgageSecuritiesLBMember"
      decimals="INF"
      id="Fact001303"
      unitRef="Ratio">0.0120</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_PVTMortgageSecuritiesLBMember"
      decimals="INF"
      id="Fact001304"
      unitRef="Ratio">-0.0074</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003871Member_custom_PVTMortgageSecuritiesLBMember"
      decimals="INF"
      id="Fact001305"
      unitRef="Ratio">0.0073</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003871Member"
      id="Fact001306">&lt;p id="xdx_A8C_err--PerformanceTableClosingTextBlock_z1Y2ZWe9c73v" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Important data provider notices and terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.
        &lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001308">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001309">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001310">&lt;p id="xdx_A84_err--ObjectivePrimaryTextBlock_z4AcXIcxKIj5" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001311">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001312">&lt;p id="xdx_A8C_err--ExpenseNarrativeTextBlock_zi5E6XpGu8Xw" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001313">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001315"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001316"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001317"
      unitRef="Ratio">0.0016</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001318"
      unitRef="Ratio">0.0070</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001319"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001320"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001321"
      unitRef="Ratio">0.0016</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001322"
      unitRef="Ratio">0.0095</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001323">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001324">&lt;p id="xdx_A87_err--ExpenseExampleNarrativeTextBlock_zRskIvb10II_zV8FyBvoRTzF" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="0"
      id="Fact001326"
      unitRef="USD">72</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="0"
      id="Fact001327"
      unitRef="USD">224</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="0"
      id="Fact001328"
      unitRef="USD">390</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="0"
      id="Fact001329"
      unitRef="USD">871</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="0"
      id="Fact001330"
      unitRef="USD">97</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="0"
      id="Fact001331"
      unitRef="USD">303</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="0"
      id="Fact001332"
      unitRef="USD">525</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="0"
      id="Fact001333"
      unitRef="USD">1166</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001334">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001335">&lt;p id="xdx_A82_err--PortfolioTurnoverTextBlock_zaY1QESTunBC" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_901_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member_zBAMh7QwrjCd"&gt;37%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      decimals="INF"
      id="Fact001336"
      unitRef="Ratio">0.37</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001337">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001338">&lt;p id="xdx_A86_err--StrategyNarrativeTextBlock_zanKHHnEqx2_zKiyoUGxOBUj" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks (growth or value stocks or both) of large U.S. companies that we believe have favorable investment potential. For example, we may purchase stocks of companies with stock prices that reflect a value lower than that which we place on the company. We may also consider other factors we believe will cause the stock price to rise. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001339">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001340">&lt;p id="xdx_A8D_err--RiskTextBlock_z8yT1WkCKrMz" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_901_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zyOTKbRc7Sgl"&gt;It is important to understand that you can lose money by investing in the fund.&lt;/span&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business
        developments or may be subject to special risks that have caused their stocks to be out of favor. Growth stocks may be more susceptible
        to earnings disappointments, and value stocks may fail to rebound. From time to time, the fund may invest a significant portion
        of its assets in companies in one or more related industries or sectors, which would make the fund more vulnerable to adverse
        developments affecting those companies, industries or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_904_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zePp9iDYsNq3"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_rr_RiskLoseMoneyMember"
      id="Fact001341">It is important to understand that you can lose money by investing in the fund.</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001342">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001343">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001344">&lt;p id="xdx_A88_err--PerformanceNarrativeTextBlock_zcZTWIvG83yy" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_909_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member_zYVS86HxsVHh"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_90C_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member_z5YcMfkU8Sz3"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_908_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003887Member_zt5et072XgOi"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future&lt;/span&gt;. &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001345">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001346">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001347">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001348">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001351"
      unitRef="Ratio">-0.0129</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001353"
      unitRef="Ratio">0.1032</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001355"
      unitRef="Ratio">0.2370</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001357"
      unitRef="Ratio">-0.0451</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001359"
      unitRef="Ratio">0.3359</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001361"
      unitRef="Ratio">0.2023</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001363"
      unitRef="Ratio">0.2444</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001365"
      unitRef="Ratio">-0.1707</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001367"
      unitRef="Ratio">0.2916</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001369"
      unitRef="Ratio">0.2661</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001370">Best calendar quarte</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001371">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      decimals="INF"
      id="Fact001372"
      unitRef="Ratio">0.2149</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001373">Worst calendar quarte</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001374">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      decimals="INF"
      id="Fact001375"
      unitRef="Ratio">-0.1900</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001376">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001378"
      unitRef="Ratio">0.2661</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001379"
      unitRef="Ratio">0.1520</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010869Member"
      decimals="INF"
      id="Fact001380"
      unitRef="Ratio">0.1330</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001381"
      unitRef="Ratio">0.2628</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001382"
      unitRef="Ratio">0.1491</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_C000010870Member"
      decimals="INF"
      id="Fact001383"
      unitRef="Ratio">0.1302</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001384"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001385"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001386"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact001387"
      unitRef="Ratio">0.2502</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact001388"
      unitRef="Ratio">0.1453</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003887Member_custom_SP500IndexMember"
      decimals="INF"
      id="Fact001389"
      unitRef="Ratio">0.1310</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003887Member"
      id="Fact001390">&lt;p id="xdx_A8D_err--PerformanceTableClosingTextBlock_zJD6eCanmIaB" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001392">Fund summary</rr:RiskReturnHeading>
    <dei:EntityTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001393">&lt;p id="xdx_A87_edei--EntityTextBlock_zf5y0XhTXV7c" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Effective on January 15, 2025,
        the fund is open for purchases and incoming exchanges only by the categories of investors described below:&lt;/span&gt;&lt;/p&gt;


&lt;table cellspacing="0" style="font: 300 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 2px 1% 6px; width: 98%"&gt;
&lt;tr&gt;
    &lt;td style="padding: 2px 12px 2px 0px; text-align: left; vertical-align: top; width: 3%"&gt;&lt;span style="-sec-ix-redline: true"&gt;&#x2022;&lt;/span&gt;&lt;/td&gt;
    &lt;td style="padding: 2px 12px 2px 0px; text-align: left; vertical-align: top; width: 97%"&gt;&lt;span style="-sec-ix-redline: true"&gt;Existing and new separate accounts of
    insurance companies that have existing separate accounts invested in the fund as of January 15, 2025; and&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;


&lt;table cellspacing="0" style="font: 300 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 2px 1% 6px; width: 98%"&gt;
&lt;tr&gt;
    &lt;td style="padding: 2px 12px 2px 0px; text-align: left; vertical-align: top; width: 3%"&gt;&lt;span style="-sec-ix-redline: true"&gt;&#x2022;&lt;/span&gt;&lt;/td&gt;
    &lt;td style="padding: 2px 12px 2px 0px; text-align: left; vertical-align: top; width: 97%"&gt;&lt;span style="-sec-ix-redline: true"&gt;Funds offered exclusively to separate
    accounts of insurance companies that have an agreement with the Distributor as of January 15, 2025.&lt;/span&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;


&lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund reserves the right to (i)
make additional exceptions to those detailed above that, in the Investment Manager&#x2019;s judgement, do not adversely affect the portfolio
managers&#x2019; ability to manage the fund&#x2019;s portfolio and (ii) reject any investment in the fund that the Investment Manager believes
will adversely affect the portfolio managers&#x2019; ability to manage the fund&#x2019;s portfolio.&lt;/span&gt;&lt;/p&gt;
        </dei:EntityTextBlock>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001394">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001395">&lt;p id="xdx_A89_err--ObjectivePrimaryTextBlock_zJBykhJKo19Q" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001396">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001397">&lt;p id="xdx_A84_err--ExpenseNarrativeTextBlock_zcNZGzXqa9oz" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001398">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001400"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001401"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001402"
      unitRef="Ratio">0.0032</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001403"
      unitRef="Ratio">0.0093</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001404"
      unitRef="Ratio">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001405"
      unitRef="Ratio">0.0088</rr:NetExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001406"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001407"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001408"
      unitRef="Ratio">0.0032</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001409"
      unitRef="Ratio">0.0118</rr:ExpensesOverAssets>
    <rr:FeeWaiverOrReimbursementOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001410"
      unitRef="Ratio">-0.0005</rr:FeeWaiverOrReimbursementOverAssets>
    <rr:NetExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001411"
      unitRef="Ratio">0.0113</rr:NetExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001413">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001414">&lt;p id="xdx_A84_err--ExpenseExampleNarrativeTextBlock_zYAP7uAlo9no" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Only the first year of each period in the example takes into account the expense reimbursement described above. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="0"
      id="Fact001416"
      unitRef="USD">90</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="0"
      id="Fact001417"
      unitRef="USD">291</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="0"
      id="Fact001418"
      unitRef="USD">510</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="0"
      id="Fact001419"
      unitRef="USD">1138</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="0"
      id="Fact001420"
      unitRef="USD">115</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="0"
      id="Fact001421"
      unitRef="USD">370</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="0"
      id="Fact001422"
      unitRef="USD">644</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="0"
      id="Fact001423"
      unitRef="USD">1427</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001424">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001425">&lt;p id="xdx_A87_err--PortfolioTurnoverTextBlock_zejNBbGV7NFm" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund pays transaction-related costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_908_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member_zz2cUecUz15e"&gt;61%&lt;/span&gt;.
        &lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      decimals="INF"
      id="Fact001426"
      unitRef="Ratio">0.61</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001427">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001428">&lt;p id="xdx_A89_err--StrategyNarrativeTextBlock_zG6f6o2JN2KQ" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in common
        stocks of small U.S. companies, with a focus on growth stocks. Growth stocks are stocks of companies whose earnings are expected
        to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock
        price. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in companies of a size similar to those
        in the Russell 2000&#xae; Growth Index. This policy may be changed only after 60 days&#x2019; notice to shareholders. As of March
        31, 2025, the index was composed of companies having market capitalizations of between approximately $5.2 million and $15.0 billion.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001429">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001430">&lt;p id="xdx_A86_err--RiskTextBlock_za9U5ZeG6xmL" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90E_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zV2PJTLbSdX"&gt;It is important to understand that you can lose money by investing in the fund.
&lt;/span&gt;        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business
        developments or may be subject to special risks that have caused their stocks to be out of favor. Growth stocks may be more susceptible
        to earnings disappointments, and the market may not favor growth-style investing. These risks are generally greater for small
        and midsize companies. From time to time, the fund may invest a significant portion of its assets in companies in one or more
        related industries or sectors, which would make the fund more vulnerable to adverse developments affecting those companies, industries
        or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The fund may not achieve its goal, and it is not intended to be a complete investment program. &lt;span id="xdx_908_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_z8Z5Vr2hfN5e"&gt;An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
&lt;/span&gt;        &lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_rr_RiskLoseMoneyMember"
      id="Fact001431">It is important to understand that you can lose money by investing in the fund.
</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001432">An investment in the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001433">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001434">&lt;p id="xdx_A8A_err--PerformanceNarrativeTextBlock_zDBb7gf9VuQK" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_909_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member_zJzJRzfgg3Bf"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Before
        September 17, 2018, the fund was managed with a materially different investment strategy and may have achieved materially different
        performance results under its current investment strategy from that shown for periods before this date. Performance for classes
        other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The fund makes
        updated performance information, including its current net asset value per share, available at &lt;span id="xdx_907_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member_z32qVg0tZQwd"&gt;www.franklintempleton.com.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_90B_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003883Member_zgnyH8xTkgld"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future&lt;/span&gt;. &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001435">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001436">www.franklintempleton.com.</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001437">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001438">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001441"
      unitRef="Ratio">-0.0737</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001443"
      unitRef="Ratio">0.1577</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001445"
      unitRef="Ratio">0.0826</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001447"
      unitRef="Ratio">-0.1364</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001449"
      unitRef="Ratio">0.3773</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001451"
      unitRef="Ratio">0.4871</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001453"
      unitRef="Ratio">0.1418</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001455"
      unitRef="Ratio">-0.2811</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001457"
      unitRef="Ratio">0.2346</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001459"
      unitRef="Ratio">0.2367</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001460">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001461">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      decimals="INF"
      id="Fact001462"
      unitRef="Ratio">0.3268</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001463">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001464">2018-12-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      decimals="INF"
      id="Fact001465"
      unitRef="Ratio">-0.2045</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001466">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001468"
      unitRef="Ratio">0.2367</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001469"
      unitRef="Ratio">0.1326</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010861Member"
      decimals="INF"
      id="Fact001470"
      unitRef="Ratio">0.0991</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001471"
      unitRef="Ratio">0.2333</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001472"
      unitRef="Ratio">0.1297</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_C000010862Member"
      decimals="INF"
      id="Fact001473"
      unitRef="Ratio">0.0964</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001474"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001475"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001476"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell2000GrowthIndexMember"
      decimals="INF"
      id="Fact001477"
      unitRef="Ratio">0.1515</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell2000GrowthIndexMember"
      decimals="INF"
      id="Fact001478"
      unitRef="Ratio">0.0686</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003883Member_custom_Russell2000GrowthIndexMember"
      decimals="INF"
      id="Fact001479"
      unitRef="Ratio">0.0809</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003883Member"
      id="Fact001480">&lt;p id="xdx_A83_err--PerformanceTableClosingTextBlock_zdCsUIL8I1rS" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001482">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001483">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001484">&lt;p id="xdx_A80_err--ObjectivePrimaryTextBlock_zNSvC9FxBxac" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks capital appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001485">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001486">&lt;p id="xdx_A87_err--ExpenseNarrativeTextBlock_zlPUzjNAYEJ_zpXPapF1wYOR" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001487">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001489"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001490"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001491"
      unitRef="Ratio">0.0016</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001492"
      unitRef="Ratio">0.0077</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001493"
      unitRef="Ratio">0.0061</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001494"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001495"
      unitRef="Ratio">0.0016</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001496"
      unitRef="Ratio">0.0102</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001497">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001498">&lt;p id="xdx_A85_err--ExpenseExampleNarrativeTextBlock_zwakE07vbZAb" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="0"
      id="Fact001500"
      unitRef="USD">79</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="0"
      id="Fact001501"
      unitRef="USD">246</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="0"
      id="Fact001502"
      unitRef="USD">428</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="0"
      id="Fact001503"
      unitRef="USD">954</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="0"
      id="Fact001504"
      unitRef="USD">104</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="0"
      id="Fact001505"
      unitRef="USD">325</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="0"
      id="Fact001506"
      unitRef="USD">563</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="0"
      id="Fact001507"
      unitRef="USD">1248</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001508">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001509">&lt;p id="xdx_A8F_err--PortfolioTurnoverTextBlock_z4ED7sV9tZtv" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_90B_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member_zRlZ3YTTqggl"&gt;92%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      decimals="INF"
      id="Fact001510"
      unitRef="Ratio">0.92</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001511">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001512">&lt;p id="xdx_A86_err--StrategyNarrativeTextBlock_zHbXpHqCHI24" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;We invest mainly in common
        stocks of small U.S. companies, with a focus on value stocks. Value stocks are issued by companies that we believe are currently
        undervalued by the market. If we are correct and other investors ultimately recognize the value of the company, the price of
        its stock may rise. Under normal circumstances, we invest at least 80% of the fund&#x2019;s net assets in companies of a size
        similar to those in the Russell 2000 Value Index. This policy may be changed only after 60 days&#x2019; notice to shareholders.
        As of March 31, 2025, the index was composed of companies having market capitalizations of between approximately $5.2 million
        and $14.2 billion. We may consider, among other factors, a company&#x2019;s valuation, financial strength, growth potential, competitive
        position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments.&lt;/span&gt;&lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001513">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001514">&lt;p id="xdx_A85_err--RiskTextBlock_zxMH2wWofKFy" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_903_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member__rr--RiskAxis__rr--RiskLoseMoneyMember_z3lBR818S7Y7"&gt;It is important to understand that you can lose money by investing in the fund.
&lt;/span&gt;        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject. Companies whose stocks we believe are undervalued by the market may have experienced adverse business
        developments or may be subject to special risks that have caused their stocks to be out of favor. Value stocks may fail to rebound,
        and the market may not favor value-style investing. These risks are generally greater for small and midsize companies. From time
        to time, the fund may invest a significant portion of its assets in companies in one or more related industries or sectors, which
        would make the fund more vulnerable to adverse developments affecting those industries or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may not achieve its
        goal, and it is not intended to be a complete investment program. &lt;span id="xdx_908_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zD8gdx0Txcok"&gt;An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_rr_RiskLoseMoneyMember"
      id="Fact001515">It is important to understand that you can lose money by investing in the fund.
</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001516">An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001517">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001518">&lt;p id="xdx_A8C_err--PerformanceNarrativeTextBlock_zeGLePtRJkan" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_904_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member_z0QjWmGPVqT5"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance and an additional index with characteristics relevant to the fund. Performance
        for classes other than those shown may vary from the performance shown to the extent the expenses for those classes differ. The
        fund makes updated performance information, including its current net asset value per share, available at &lt;span id="xdx_906_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member_zxkQ7rWTpKZ8"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_905_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003888Member_zAWPPvHPTXK3"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001519">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001520">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001521">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001522">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001525"
      unitRef="Ratio">-0.0390</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001527"
      unitRef="Ratio">0.2770</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001529"
      unitRef="Ratio">0.0815</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001531"
      unitRef="Ratio">-0.1942</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001533"
      unitRef="Ratio">0.2412</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001535"
      unitRef="Ratio">0.0412</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001537"
      unitRef="Ratio">0.4037</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001539"
      unitRef="Ratio">-0.1280</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001541"
      unitRef="Ratio">0.2413</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001543"
      unitRef="Ratio">0.0648</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001544">Best calendar quarte</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001545">2020-12-31</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      decimals="INF"
      id="Fact001546"
      unitRef="Ratio">0.3430</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001547">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001548">2020-03-31</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      decimals="INF"
      id="Fact001549"
      unitRef="Ratio">-0.4027</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001550">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001552"
      unitRef="Ratio">0.0648</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001553"
      unitRef="Ratio">0.1099</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010871Member"
      decimals="INF"
      id="Fact001554"
      unitRef="Ratio">0.0838</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001555"
      unitRef="Ratio">0.0620</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001556"
      unitRef="Ratio">0.1071</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_C000010872Member"
      decimals="INF"
      id="Fact001557"
      unitRef="Ratio">0.0810</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001558"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001559"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001560"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell2000ValueIndexMember"
      decimals="INF"
      id="Fact001561"
      unitRef="Ratio">0.0805</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell2000ValueIndexMember"
      decimals="INF"
      id="Fact001562"
      unitRef="Ratio">0.0729</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003888Member_custom_Russell2000ValueIndexMember"
      decimals="INF"
      id="Fact001563"
      unitRef="Ratio">0.0714</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003888Member"
      id="Fact001564">&lt;p id="xdx_A81_err--PerformanceTableClosingTextBlock_zmR2QY3DY7j3" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001566">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001567">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001568">&lt;p id="xdx_A8D_err--ObjectivePrimaryTextBlock_zDy6Qli8e9P_zw1ppo3dzeJg" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks long-term capital
        appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001569">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001570">&lt;p id="xdx_A8C_err--ExpenseNarrativeTextBlock_zbWaE5Pr6lAk" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001571">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001573"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001574"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001575"
      unitRef="Ratio">0.0027</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001576"
      unitRef="Ratio">0.0081</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001577"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001578"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001579"
      unitRef="Ratio">0.0027</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001580"
      unitRef="Ratio">0.0106</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001581">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001582">&lt;p id="xdx_A80_err--ExpenseExampleNarrativeTextBlock_zwucNbInxP8l" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;The following hypothetical example
        is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does
        not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in
        the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5%
        return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher
        or lower.&lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="0"
      id="Fact001584"
      unitRef="USD">83</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="0"
      id="Fact001585"
      unitRef="USD">259</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="0"
      id="Fact001586"
      unitRef="USD">450</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="0"
      id="Fact001587"
      unitRef="USD">1002</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="0"
      id="Fact001588"
      unitRef="USD">108</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="0"
      id="Fact001589"
      unitRef="USD">337</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="0"
      id="Fact001590"
      unitRef="USD">585</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="0"
      id="Fact001591"
      unitRef="USD">1294</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001592">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001593">&lt;p id="xdx_A81_err--PortfolioTurnoverTextBlock_zO4HAp7RcyIX" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_905_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member_zFyZwwm2lZga"&gt;66%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      decimals="INF"
      id="Fact001594"
      unitRef="Ratio">0.66</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001595">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001596">&lt;p id="xdx_A8E_err--StrategyNarrativeTextBlock_zSIwLFSc8vP2" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks of U.S. companies of any size, with a focus on companies whose products and services we believe provide solutions that directly contribute to sustainable social, environmental and economic development (Solutions Companies). Stocks of this type of company are typically, but not always, considered to be growth stocks. Growth stocks are stocks of companies whose revenues, earnings, or cash flows are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company&#x2019;s impact on sustainable environmental, social and economic development (as described below), valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also invest in non-U.S. companies.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Our approach to sustainable investing incorporates fundamental research together with consideration of sustainable environmental, social and economic development impact. We believe that companies whose products and services produce positive environmental, social and economic development impact also often demonstrate potential for strong financial growth. Under normal circumstances, the fund invests at least 80% of the value of its net assets in securities that meet our sustainability criteria. These criteria are based on a proprietary sustainability solutions map that links to the United Nations Sustainable Development Goals (SDGs). In applying these criteria, we will assign each company a proprietary environmental, social and/or corporate governance (ESG) rating ranging from 1 to 4 (1 indicating the highest (best) ESG rating and 4 indicating the lowest (worst) ESG rating). In order to meet our sustainability criteria for purposes of this investment policy, a company must be rated 2 or 1 by us. This policy is non-fundamental and may be changed only after 60 days&#x2019; notice to shareholders. In selecting each investment, we consider the extent to which a company&#x2019;s products or services may provide solutions to forward-looking sustainability needs, creating positive impact in environmental, social and economic development areas. Environmental impacts may include, for example, reduction of carbon emissions and improved water quality. Social impacts may include, for example, improvements in employee well-being, supplier standards, or access to products, information, or security. Economic development impacts may include, for example, stakeholder analysis and shared value approaches to business practices, access to economic opportunity, or improvements in operational effectiveness or efficiency.
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001597">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001598">&lt;p id="xdx_A8B_err--RiskTextBlock_zDX0RReP3Zum" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_907_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zyh5WVn4TGR6"&gt;It is important to understand that you can lose money by investing in the fund&lt;/span&gt;.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;The value of a company&#x2019;s
        stock may fall or fail to rise as a result of factors directly relating to that company, such as decisions made by its management
        or lower demand for the company&#x2019;s products or services. A stock&#x2019;s value may also fall because of factors affecting
        not just the company, but also other companies in the same industry or in a number of different industries, such as increases
        in production costs.&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;Growth stocks may be more susceptible
        to earnings disappointments and the market may not favor growth-style investing. These risks are generally greater for small
        and midsized companies. From time to time, the fund may invest a significant portion of its assets in companies in one or more
        related industries or sectors, which would make the fund more vulnerable to adverse developments affecting those companies, industries
        or sectors.&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;Investing with a focus on Solutions
        Companies, whose products and services may provide solutions that directly impact sustainable environmental, social and economic
        development, may result in the fund investing in certain types of companies, industries or sectors that the market may not favor.
        In evaluating an investment opportunity, we may make investment decisions based on information and data that is incomplete or
        inaccurate. Sustainability and ESG factors are not uniformly defined and applying such factors involves subjective assessments.
        Sustainability and ESG scorings and assessments of issuers can vary across third-party data providers and may change over time.
        In addition, a company&#x2019;s business practices, products or services may change over time. As a result of these possibilities,
        among others, the fund may temporarily hold securities that are inconsistent with the fund&#x2019;s sustainable investment criteria.
        Regulatory changes or interpretations regarding the definitions and/or use of ESG or other sustainability criteria could have
        a material adverse effect on the fund&#x2019;s ability to invest in accordance with its investment policies and/or achieve its
        investment objective, as well as the ability of certain classes of investors to invest in funds, such as the fund, whose strategies
        include ESG or other sustainability criteria.&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;There is no guarantee that
        the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the
        intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected
        for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively
        impact the fund.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;The fund may not achieve its
        goal, and it is not intended to be a complete investment program. &lt;span id="xdx_901_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zCC9d9I16BQh"&gt;An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;&lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_rr_RiskLoseMoneyMember"
      id="Fact001599">It is important to understand that you can lose money by investing in the fund</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001600">An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001601">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001602">&lt;p id="xdx_A8D_err--PerformanceNarrativeTextBlock_zpwvmMq4pdhi" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_90E_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member_zWnNy8fa8LO4"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance, an additional index with characteristics relevant to the fund and the
        Putnam VT Sustainable Future Linked Benchmark, which represents the performance of the Russell 3000&#xae; Value Index through
        April 29, 2018, and the performance of the Russell Midcap&#xae; Growth Index thereafter. Before April 30, 2018, the fund was managed
        with a materially different investment strategy and may have achieved materially different performance results under its current
        investment strategy from that shown for the periods before this date. Performance for classes other than those shown may vary
        from the performance shown to the extent the expenses for those classes differ. The fund makes updated performance information,
        including its current net asset value per share, available at &lt;span id="xdx_900_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member_ziDoVaSx5c5f"&gt;www.franklintempleton.com.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;i&gt;&lt;span id="xdx_909_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003881Member_zzpUqhJZhuBa"&gt;The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/span&gt; &lt;/i&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001603">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001604">www.franklintempleton.com.</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001605">The fund&#x2019;s past performance
        (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001606">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001609"
      unitRef="Ratio">-0.0406</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001611"
      unitRef="Ratio">0.1323</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001613"
      unitRef="Ratio">0.1094</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001615"
      unitRef="Ratio">-0.0464</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001617"
      unitRef="Ratio">0.3032</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001619"
      unitRef="Ratio">0.5299</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001621"
      unitRef="Ratio">0.0633</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001623"
      unitRef="Ratio">-0.3385</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001625"
      unitRef="Ratio">0.2883</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001627"
      unitRef="Ratio">0.1523</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001628">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001629">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      decimals="INF"
      id="Fact001630"
      unitRef="Ratio">0.3372</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001631">Worst calendar quarte</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001632">2022-06-30</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      decimals="INF"
      id="Fact001633"
      unitRef="Ratio">-0.2147</rr:BarChartLowestQuarterlyReturn>
    <rr:BarChartClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001634">&lt;p id="xdx_A82_err--BarChartClosingTextBlock_zsIkrvb1XV1O" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;b&gt;Average annual total returns &lt;/b&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;(for periods ended 12/31/24)&lt;/span&gt;&lt;/p&gt;


</rr:BarChartClosingTextBlock>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001636"
      unitRef="Ratio">0.1523</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001637"
      unitRef="Ratio">0.0982</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010857Member"
      decimals="INF"
      id="Fact001638"
      unitRef="Ratio">0.0911</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001639"
      unitRef="Ratio">0.1488</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001640"
      unitRef="Ratio">0.0954</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_C000010858Member"
      decimals="INF"
      id="Fact001641"
      unitRef="Ratio">0.0884</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001642"
      unitRef="Ratio">0.2381</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001643"
      unitRef="Ratio">0.1386</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_Russell3000IndexMember"
      decimals="INF"
      id="Fact001644"
      unitRef="Ratio">0.1255</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_RussellMidcapGrowthIndexMember"
      decimals="INF"
      id="Fact001645"
      unitRef="Ratio">0.2210</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_RussellMidcapGrowthIndexMember"
      decimals="INF"
      id="Fact001646"
      unitRef="Ratio">0.1147</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_RussellMidcapGrowthIndexMember"
      decimals="INF"
      id="Fact001647"
      unitRef="Ratio">0.1154</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_PVTSustainableFutureLBMember"
      decimals="INF"
      id="Fact001648"
      unitRef="Ratio">0.2210</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_PVTSustainableFutureLBMember"
      decimals="INF"
      id="Fact001649"
      unitRef="Ratio">0.1147</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003881Member_custom_PVTSustainableFutureLBMember"
      decimals="INF"
      id="Fact001650"
      unitRef="Ratio">0.1068</rr:AverageAnnualReturnYear10>
    <rr:PerformanceTableClosingTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003881Member"
      id="Fact001651">&lt;p id="xdx_A86_err--PerformanceTableClosingTextBlock_zh4uYpNqcSrR" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Important data provider notices and
terms are available at &lt;span style="text-decoration: underline"&gt;www.franklintempletondatasources.com&lt;/span&gt;. All data is subject to change.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceTableClosingTextBlock>
    <rr:RiskReturnHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001653">Fund summary</rr:RiskReturnHeading>
    <rr:ObjectiveHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001654">Goal</rr:ObjectiveHeading>
    <rr:ObjectivePrimaryTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001655">&lt;p id="xdx_A8A_err--ObjectivePrimaryTextBlock_z811GEoBUjIW" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund seeks long-term capital
        appreciation.&lt;/span&gt;&lt;/p&gt;
        </rr:ObjectivePrimaryTextBlock>
    <rr:ExpenseHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001656">Fees and expenses</rr:ExpenseHeading>
    <rr:ExpenseNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001657">&lt;p id="xdx_A80_err--ExpenseNarrativeTextBlock_zvwPHjZPfJtP" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following table describes the fees and expenses you may pay if you buy, hold and sell shares of the fund.
            &lt;b&gt;You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.
            &lt;/b&gt; The fees and expenses information does not reflect insurance-related charges or expenses borne by contract holders indirectly investing in the fund. If it did, expenses would be higher.
        &lt;/p&gt;
        </rr:ExpenseNarrativeTextBlock>
    <rr:OperatingExpensesCaption
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001658">Annual Fund Operating Expenses (expenses
        you pay each year as a percentage of the value of your investment)</rr:OperatingExpensesCaption>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001660"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001661"
      unitRef="Ratio">0</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001662"
      unitRef="Ratio">0.0009</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001663"
      unitRef="Ratio">0.0063</rr:ExpensesOverAssets>
    <rr:ManagementFeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="INF"
      id="Fact001664"
      unitRef="Ratio">0.0054</rr:ManagementFeesOverAssets>
    <rr:DistributionAndService12b1FeesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="INF"
      id="Fact001665"
      unitRef="Ratio">0.0025</rr:DistributionAndService12b1FeesOverAssets>
    <rr:OtherExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="INF"
      id="Fact001666"
      unitRef="Ratio">0.0009</rr:OtherExpensesOverAssets>
    <rr:ExpensesOverAssets
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="INF"
      id="Fact001667"
      unitRef="Ratio">0.0088</rr:ExpensesOverAssets>
    <rr:ExpenseExampleHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001668">Example</rr:ExpenseExampleHeading>
    <rr:ExpenseExampleNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001669">&lt;p id="xdx_A8D_err--ExpenseExampleNarrativeTextBlock_zBh3swHIUgQF" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The following hypothetical example is intended to help you compare the cost of investing in the fund with the cost of investing in other funds. The example does not reflect insurance-related charges or expenses. If it did, expenses would be higher. It assumes that you invest $10,000 in the fund for the time periods indicated and then redeem or hold all your shares at the end of those periods. It assumes a 5% return on your investment each year and that the fund&#x2019;s operating expenses remain the same. Your actual costs may be higher or lower.
        &lt;/p&gt;


</rr:ExpenseExampleNarrativeTextBlock>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="0"
      id="Fact001671"
      unitRef="USD">64</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="0"
      id="Fact001672"
      unitRef="USD">202</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="0"
      id="Fact001673"
      unitRef="USD">351</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="0"
      id="Fact001674"
      unitRef="USD">786</rr:ExpenseExampleYear10>
    <rr:ExpenseExampleYear01
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="0"
      id="Fact001675"
      unitRef="USD">90</rr:ExpenseExampleYear01>
    <rr:ExpenseExampleYear03
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="0"
      id="Fact001676"
      unitRef="USD">281</rr:ExpenseExampleYear03>
    <rr:ExpenseExampleYear05
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="0"
      id="Fact001677"
      unitRef="USD">488</rr:ExpenseExampleYear05>
    <rr:ExpenseExampleYear10
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="0"
      id="Fact001678"
      unitRef="USD">1084</rr:ExpenseExampleYear10>
    <rr:PortfolioTurnoverHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001679">Portfolio turnover</rr:PortfolioTurnoverHeading>
    <rr:PortfolioTurnoverTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001680">&lt;p id="xdx_A8C_err--PortfolioTurnoverTextBlock_zjuBqOd3q68j" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund pays transaction-related
        costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A higher turnover
        rate may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or the above
        example, affect fund performance. The fund&#x2019;s turnover rate in the most recent fiscal year was &lt;span id="xdx_908_err--PortfolioTurnoverRate_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member_z6vNuVMe4pd5"&gt;32%&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        </rr:PortfolioTurnoverTextBlock>
    <rr:PortfolioTurnoverRate
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      decimals="INF"
      id="Fact001681"
      unitRef="Ratio">0.32</rr:PortfolioTurnoverRate>
    <rr:StrategyHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001682">Investments, risks, and performance</rr:StrategyHeading>
    <rr:StrategyNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001683">&lt;p id="xdx_A8E_err--StrategyNarrativeTextBlock_zqfmBAmaIHkB" style="font: 14pt/1.5 Arial, Helvetica, Sans-Serif; margin: 18px 1% 3px"&gt;
            &lt;b&gt;Investments
            &lt;/b&gt;
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
We invest mainly in common stocks of U.S. companies of any size, with a focus on companies that we believe exhibit a commitment to financially material sustainable business practices. We may also invest in non-U.S. companies. In evaluating investments for the fund, we view &#x201c;financially material sustainable business practices&#x201d; as business practices that we believe are reasonably likely to impact the financial condition or operating performance of a company and that relate to environmental, social, or corporate governance issues. We identify relevant ESG issues on a sector-specific basis using an internally developed materiality map, which is informed by the industry-specific financial materiality framework of the Sustainability Accounting Standards Board (&#x201c;SASB,&#x201d; now incorporated in the International Financial Reporting Standards Foundation). As part of this analysis, we may utilize metrics and information such as emissions data, carbon intensity, sources of energy used for operations, water use and re-use, water generation, waste diversion from landfill, employee safety and diversity data, supplier audits, product safety, board composition, and incentive compensation structures. Stocks of companies that exhibit a commitment to financially material sustainable business practices are typically, but not always, considered to be growth stocks. Growth stocks are stocks of companies whose revenues, earnings, or cash flows are expected to grow faster than those of similar firms, and whose business growth and other characteristics may lead to an increase in stock price. We may consider, among other factors, a company&#x2019;s sustainable business practices (as described above), valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. We may also invest in non-U.S. companies.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
Under normal circumstances, the fund invests at least 80% of the value of its net assets in securities that meet our sustainability criteria. These criteria are based on a proprietary materiality map that is informed by the industry-specific financial materiality framework of SASB. In applying these criteria, we will assign each company a proprietary ESG rating ranging from 1 to 4 (1 indicating the highest (best) ESG rating and 4 indicating the lowest (worst) ESG rating). In order to meet our sustainability criteria for purposes of this investment policy, a company must be rated 2 or 1 by us. This policy is non-fundamental and may be changed only after 60 days&#x2019; notice to shareholders. In selecting each investment, we focus on companies that have a demonstrated commitment to sustainable business practices in areas that are relevant and material to their long-term financial returns and risk profiles. We believe that companies that have exhibited such a commitment also often demonstrate potential for strong financial growth. This commitment may be reflected through ESG policies, practices, or outcomes. The fund&#x2019;s approach to sustainable investing incorporates fundamental research together with consideration of ESG factors. Environmental factors include, for example, a company&#x2019;s carbon intensity and use of resources like water or minerals. Sustainability measures in this area might include plans to reduce waste, increase recycling, raise the proportion of energy supply from renewable sources, or improve product design to be less resource intensive. Social factors include, for example, labor practices and supply chain management. Sustainability measures in this area might include programs to improve employee well-being, commitment to workplace equality and diversity, or improved stewardship of supplier relationships and working conditions. Corporate governance factors include, for example, board composition and executive compensation. Sustainability measures in this area might include improvements in board independence or diversity, or alignment of management incentives with the company&#x2019;s strategic sustainability objectives. Our integrated approach combines analysis of the growing body of ESG data and deep fundamental analysis and looks for companies that demonstrate leadership, beyond compliance, on relevant sustainability issues. The characteristics that we may use when considering sustainability leadership include:
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
(1) Material. Focused on strategic, business-relevant issues.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
(2) Proactive. Actions that go beyond basic requirements to create potential business benefit.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
(3) Transparent. Reporting that is relevant, timely, and candid.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
(4) Effective. Creating benefits both within the firm and beyond its corporate borders.
            &lt;br/&gt;
        &lt;/p&gt;
        </rr:StrategyNarrativeTextBlock>
    <rr:RiskHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001684">Risks</rr:RiskHeading>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001685">&lt;p id="xdx_A89_err--RiskTextBlock_zYwig2KFXELH" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
&lt;span id="xdx_90B_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member__rr--RiskAxis__rr--RiskLoseMoneyMember_zJm14c2ckvh4"&gt;It is important to understand that you can lose money by investing in the fund&lt;/span&gt;.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of investments in
        the fund&#x2019;s portfolio may fall or fail to rise over extended periods of time for a variety of reasons, including general
        economic, political or financial market conditions, investor sentiment and market perceptions, government actions, geopolitical
        events or changes, outbreaks of infectious illnesses or other widespread public health issues, and factors related to a specific
        issuer, asset class, geography, industry or sector. These and other factors may lead to increased volatility and reduced liquidity
        in the fund&#x2019;s portfolio holdings, may negatively impact the fund&#x2019;s performance, and may exacerbate other risks to
        which the fund is subject.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
The value of a company&#x2019;s stock may fall or fail to rise as a result of factors directly relating to that company, such as decisions made by its management or lower demand for the company&#x2019;s products or services. A stock&#x2019;s value may also fall because of factors affecting not just the company, but also other companies in the same industry or in a number of different industries, such as increases in production costs.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Growth stocks may be more
        susceptible to earnings disappointments and the market may not favor growth-style investing. These risks are generally greater
        for small and midsized companies. From time to time, the fund may invest a significant portion of its assets in companies in
        one or more related industries or sectors, which would make the fund more vulnerable to adverse developments affecting those
        industries or sectors.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The value of international
        investments traded in foreign currencies may be adversely impacted by fluctuations in exchange rates. International investments,
        particularly investments in emerging markets, may carry risks associated with potentially less stable economies or governments
        (such as the risk of seizure by a foreign government, the imposition of economic sanctions or currency or other restrictions,
        or high levels of inflation), and may be or become illiquid.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Investing with a focus on
        companies that exhibit a commitment to sustainable practices may result in the fund investing in certain types of companies,
        industries or sectors that the market may not favor. In evaluating an investment opportunity, we may make investment decisions
        based on information and data that is incomplete or inaccurate. Sustainability and ESG factors are not uniformly defined and
        applying such factors involves subjective assessments. Sustainability and ESG scorings and assessments of issuers can vary across
        third-party data providers and may change over time. In addition, a company&#x2019;s business practices, products or services
        may change over time. As a result of these possibilities, among others, the fund may temporarily hold securities that are inconsistent
        with the fund&#x2019;s sustainable investment criteria. Regulatory changes or interpretations regarding the definitions and/or
        use of ESG or other sustainability criteria could have a material adverse effect on the fund&#x2019;s ability to invest in accordance
        with its investment policies and/or achieve its investment objective, as well as the ability of certain classes of investors
        to invest in funds, such as the fund, whose strategies include ESG or other sustainability criteria.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may be an investment
        option for mutual funds that are managed by the Investment Manager and its affiliates as &#x201c;funds of funds.&#x201d; Additionally,
        other investors from time to time may make substantial investments in the fund. Such shareholders may at times be considered
        to control the fund. Dispositions of a large number of shares by these shareholders may adversely affect the fund&#x2019;s liquidity
        and net assets. These redemptions may also force the fund to sell securities, which may increase the fund&#x2019;s brokerage costs.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;
There is no guarantee that the investment techniques, analyses, or judgments that we apply in making investment decisions for the fund will produce the intended outcome or that the investments we select for the fund will perform as well as other securities that were not selected for the fund. We, or the fund&#x2019;s other service providers, may experience disruptions or operating errors that could negatively impact the fund.
        &lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;The fund may not achieve its
        goal, and it is not intended to be a complete investment program. &lt;span id="xdx_90F_err--RiskTextBlock_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member__rr--RiskAxis__rr--RiskNotInsuredDepositoryInstitutionMember_zpjyLOnrV3p4"&gt;An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        </rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_rr_RiskLoseMoneyMember"
      id="Fact001686">It is important to understand that you can lose money by investing in the fund</rr:RiskTextBlock>
    <rr:RiskTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_rr_RiskNotInsuredDepositoryInstitutionMember"
      id="Fact001687">An investment in the fund is not insured or guaranteed by the
        Federal Deposit Insurance Corporation or any other government agency.</rr:RiskTextBlock>
    <rr:BarChartAndPerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001688">Performance</rr:BarChartAndPerformanceTableHeading>
    <rr:PerformanceNarrativeTextBlock
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001689">&lt;p id="xdx_A8E_err--PerformanceNarrativeTextBlock_zydmt5P63e6e" style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_907_err--PerformanceInformationIllustratesVariabilityOfReturns_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member_z7xXTYkZmlg5"&gt;The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.&lt;/span&gt; The bar chart shows changes in the fund&#x2019;s performance
        from year to year for Class IA shares.&#160;The table shows the average annual total returns of each class of the fund that has
        been in operation for at least one full calendar year and also compares the fund&#x2019;s performance with the average annual
        total returns of a broad measure of market performance, an additional index with characteristics relevant to the fund and the
        Putnam VT Sustainable Leaders Linked Benchmark, which represents the performance of the Russell 3000&#xae; Growth Index through
        August 31, 2019, and the performance of the S&amp;amp;P 500&#xae; Index thereafter. Before April 30, 2018, the fund was managed with
        a materially different investment strategy and may have achieved materially different performance results under its current investment
        strategy from that shown for the periods before this date. Performance for classes other than those shown may vary from the performance
        shown to the extent the expenses for those classes differ. The fund makes updated performance information, including its current
        net asset value per share, available at &lt;span id="xdx_904_err--PerformanceAvailabilityWebSiteAddress_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member_zRB3S3sheeQd"&gt;www.franklintempleton.com&lt;/span&gt;.&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;&lt;span id="xdx_908_err--PerformancePastDoesNotIndicateFuture_dpU_c20250501__20250501__dei--LegalEntityAxis__custom--S000003884Member_zAlQy41Avyu1"&gt;&lt;i&gt;The
fund&#x2019;s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.&lt;/i&gt;&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
        &lt;p style="font: 10pt/1.5 Arial, Helvetica, Sans-Serif; margin: 9px 1% 3px; font-weight: 300"&gt;&lt;span style="-sec-ix-redline: true"&gt;Insurance-related charges
        or expenses are not reflected in the performance information below, and if those charges were included, returns would be less
        than those shown.&lt;/span&gt;&lt;/p&gt;
        </rr:PerformanceNarrativeTextBlock>
    <rr:PerformanceInformationIllustratesVariabilityOfReturns
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001690">The accompanying bar chart
        and table provide some indication of the risks of investing in the fund.</rr:PerformanceInformationIllustratesVariabilityOfReturns>
    <rr:PerformanceAvailabilityWebSiteAddress
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001691">www.franklintempleton.com</rr:PerformanceAvailabilityWebSiteAddress>
    <rr:PerformancePastDoesNotIndicateFuture
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001692">The
fund&#x2019;s past performance (before and after taxes) is not necessarily an indication of how the fund will perform in the future.</rr:PerformancePastDoesNotIndicateFuture>
    <rr:BarChartHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001693">Annual total returns for class
        IA shares</rr:BarChartHeading>
    <rr:AnnualReturn2015
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001696"
      unitRef="Ratio">-0.0007</rr:AnnualReturn2015>
    <rr:AnnualReturn2016
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001698"
      unitRef="Ratio">0.0806</rr:AnnualReturn2016>
    <rr:AnnualReturn2017
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001700"
      unitRef="Ratio">0.2955</rr:AnnualReturn2017>
    <rr:AnnualReturn2018
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001702"
      unitRef="Ratio">-0.0128</rr:AnnualReturn2018>
    <rr:AnnualReturn2019
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001704"
      unitRef="Ratio">0.3672</rr:AnnualReturn2019>
    <rr:AnnualReturn2020
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001706"
      unitRef="Ratio">0.2904</rr:AnnualReturn2020>
    <rr:AnnualReturn2021
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001708"
      unitRef="Ratio">0.2387</rr:AnnualReturn2021>
    <rr:AnnualReturn2022
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001710"
      unitRef="Ratio">-0.2272</rr:AnnualReturn2022>
    <rr:AnnualReturn2023
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001712"
      unitRef="Ratio">0.2642</rr:AnnualReturn2023>
    <rr:AnnualReturn2024
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001714"
      unitRef="Ratio">0.2333</rr:AnnualReturn2024>
    <rr:HighestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001715">Best calendar quarter</rr:HighestQuarterlyReturnLabel>
    <rr:BarChartHighestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001716">2020-06-30</rr:BarChartHighestQuarterlyReturnDate>
    <rr:BarChartHighestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      decimals="INF"
      id="Fact001717"
      unitRef="Ratio">0.2412</rr:BarChartHighestQuarterlyReturn>
    <rr:LowestQuarterlyReturnLabel
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001718">Worst calendar quarter</rr:LowestQuarterlyReturnLabel>
    <rr:BarChartLowestQuarterlyReturnDate
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001719">2022-06-30</rr:BarChartLowestQuarterlyReturnDate>
    <rr:BarChartLowestQuarterlyReturn
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      decimals="INF"
      id="Fact001720"
      unitRef="Ratio">-0.1779</rr:BarChartLowestQuarterlyReturn>
    <rr:PerformanceTableHeading
      contextRef="From2025-05-012025-05-01_custom_S000003884Member"
      id="Fact001721">Average annual total returns 
        (for periods ended 12/31/24)</rr:PerformanceTableHeading>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001723"
      unitRef="Ratio">0.2333</rr:AverageAnnualReturnYear01>
    <rr:AverageAnnualReturnYear05
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001724"
      unitRef="Ratio">0.1400</rr:AverageAnnualReturnYear05>
    <rr:AverageAnnualReturnYear10
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010863Member"
      decimals="INF"
      id="Fact001725"
      unitRef="Ratio">0.1378</rr:AverageAnnualReturnYear10>
    <rr:AverageAnnualReturnYear01
      contextRef="From2025-05-012025-05-01_custom_S000003884Member_custom_C000010864Member"
      decimals="INF"
      id="Fact001726"
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