| Label | Element | Value |
|---|---|---|
| Technology Growth Portfolio | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk/Return [Heading] | oef_RiskReturnHeading | Fund Summary |
| Objective [Heading] | oef_ObjectiveHeading | Investment Objective |
| Objective, Primary [Text Block] | oef_ObjectivePrimaryTextBlock | The fund seeks capital appreciation. |
| Expense Heading [Optional Text] | oef_ExpenseHeading | Fees and Expenses |
| Expense Narrative [Text Block] | oef_ExpenseNarrativeTextBlock | This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and examples below. These figures also do not reflect any fees or charges imposed by participating insurance companies under their Variable Annuity contracts (VA contracts) or Variable Life Insurance policies (VLI policies), and, if such fees and/or charges were included, the fees and expenses would be higher. |
| Operating Expenses Caption [Optional Text] | oef_OperatingExpensesCaption | Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) |
| Portfolio Turnover [Heading] | oef_PortfolioTurnoverHeading | Portfolio Turnover |
| Portfolio Turnover [Text Block] | oef_PortfolioTurnoverTextBlock | The fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the fund's performance. During the most recent fiscal year, the fund's portfolio turnover rate was 29.88% of the average value of its portfolio. |
| Portfolio Turnover, Rate | oef_PortfolioTurnoverRate | 29.88% |
| Expense Example [Heading] | oef_ExpenseExampleHeading | Example |
| Expense Example Narrative [Text Block] | oef_ExpenseExampleNarrativeTextBlock | The Example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the fund for the time periods indicated and then hold or redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the fund's operating expenses remain the same. The Example does not reflect fees and expenses incurred under VA contracts and VLI policies; if they were reflected, the figures in the Example would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: |
| Strategy [Heading] | oef_StrategyHeading | Principal Investment Strategy |
| Strategy Narrative [Text Block] | oef_StrategyNarrativeTextBlock | To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in the stocks of growth companies of any size that the fund's sub-adviser, Newton Investment Management North America, LLC, an affiliate of BNY Mellon Investment Adviser, Inc., believes to be leading producers or beneficiaries of technological innovation. In choosing stocks, the fund's sub-adviser looks for technology companies with the potential for strong earnings or revenue growth rates. The fund's investment process centers on a multi-dimensional approach that looks for opportunities across emerging, cyclical or stable growth companies. The fund's investment approach seeks companies that appear to have strong earnings momentum, positive earnings revisions, favorable growth, product or market cycles and/or favorable valuations. Up to 25% of the fund's assets may be invested in foreign securities. The fund typically sells a stock when the fund's sub-adviser believes there is a more attractive alternative, or there are deteriorating fundamentals, such as a loss of competitive advantage, a failure in management execution or deteriorating capital structure. The fund also may sell stocks when the sub-adviser's evaluation of a sector has changed. |
| Bar Chart and Performance Table [Heading] | oef_BarChartAndPerformanceTableHeading | Performance |
| Performance Narrative [Text Block] | oef_PerformanceNarrativeTextBlock | The following bar chart and table provide some indication of the risks of investing in the fund. The bar chart shows changes in the performance of the fund's Initial shares from year to year. The table compares the average annual total returns of the fund's shares to those of the NYSE® Technology Index, which is designed to objectively represent the technology sector by holding 35 of the leading U.S. technology-related companies and reflects the market segment in which the fund invests, and the S&P 500® Index, a broad measure of the market performance. The fund's past performance is not necessarily an indication of how the fund will perform in the future. Performance for each share class will vary due to differences in expenses. More recent performance information may be available at www.bny.com/investments. |
| Performance Additional Market Index [Text] | oef_PerformanceAdditionalMarketIndex | The table compares the average annual total returns of the fund's shares to those of the NYSE® Technology Index, which is designed to objectively represent the technology sector by holding 35 of the leading U.S. technology-related companies and reflects the market segment in which the fund invests, and the S&P 500® Index, a broad measure of the market performance. |
| Performance Availability Website Address [Text] | oef_PerformanceAvailabilityWebSiteAddress | www.bny.com/investments |
| Performance Past Does Not Indicate Future [Text] | oef_PerformancePastDoesNotIndicateFuture | The fund's past performance is not necessarily an indication of how the fund will perform in the future. |
| Bar Chart [Heading] | oef_BarChartHeading | Year-by-Year Total Returns as of 12/31 each year (%) |
| Bar Chart Does Not Reflect Sales Loads [Text] | oef_BarChartDoesNotReflectSalesLoads | Performance information reflects the fund's expenses only and does not reflect the fees and charges imposed by participating insurance companies under their VA contracts or VLI policies. |
| Bar Chart Closing [Text Block] | oef_BarChartClosingTextBlock | During the periods shown in the chart: |
| Index No Deduction for Fees, Expenses, or Taxes [Text] | oef_IndexNoDeductionForFeesExpensesTaxes | reflects no deductions for fees, expenses or taxes |
| Average Annual Return, Caption [Optional Text] | oef_AverageAnnualReturnCaption | Average Annual Total Returns (as of 12/31/25) |
| Technology Growth Portfolio | Principal Risks | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | Principal
Risks An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. It is not a complete investment program. The fund's share price fluctuates, sometimes dramatically, which means you could lose money. |
| Technology Growth Portfolio | Risk Lose Money [Member] | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | The fund's share price fluctuates, sometimes dramatically, which means you could lose money. |
| Technology Growth Portfolio | Risk Not Insured [Member] | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | An investment in the fund is not a bank deposit. It is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. |
| Technology Growth Portfolio | · Technology company risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Technology company risk: The technology sector has been among the most volatile sectors of the stock market. Technology companies involve greater risk because their revenue and/or earnings tend to be less predictable (and some companies may be experiencing significant losses) and their share prices tend to be more volatile. Certain technology companies may have limited product lines, markets or financial resources, or may depend on a limited management group. Technology companies are heavily dependent on patent and other intellectual property rights. In addition, these companies are strongly affected by worldwide technological developments, government regulation, and increased competition, and their products and services may not be economically successful or may quickly become outdated. Investor perception may play a greater role in determining the day-to-day value of tech stocks than it does in other sectors. Fund investments made in anticipation of future products and services may decline dramatically in value if the anticipated products or services are delayed or cancelled. |
| Technology Growth Portfolio | · Risks of stock investing | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Risks of stock investing: Stocks generally fluctuate more in value than bonds and may decline significantly over short time periods. There is the chance that stock prices overall will decline because stock markets tend to move in cycles, with periods of rising prices and falling prices. The market value of a stock may decline due to general market conditions or because of factors that affect the particular company or the company's industry. |
| Technology Growth Portfolio | · Small and midsize company risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Small and midsize company risk: Small and midsize companies carry additional risks because the operating histories of these companies tend to be more limited, their earnings and revenues less predictable (and some companies may be experiencing significant losses), and their share prices more volatile than those of larger, more established companies. These companies may have limited product lines, markets or financial resources, or may depend on a limited management group. Investments may be made in anticipation of future products, services or events whose delay or cancellation could cause the stock price to drop. The shares of smaller companies tend to trade less frequently than those of larger, more established companies, which can adversely affect the pricing of these securities and the fund's ability to sell these securities. |
| Technology Growth Portfolio | · Growth stock risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Growth stock risk: Investors often expect growth companies to increase their earnings at a certain rate. If these expectations are not met, investors can punish the stocks inordinately, even if earnings do increase. In addition, growth stocks may lack the dividend yield that may cushion stock prices in market downturns. |
| Technology Growth Portfolio | · Foreign investment risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Foreign investment risk: To the extent the fund invests in foreign securities, the fund's performance will be influenced by political, social and economic factors affecting investments in foreign issuers. Special risks associated with investments in foreign issuers include exposure to currency fluctuations, less liquidity, less developed or less efficient trading markets, lack of comprehensive and less publicly available company information, political and economic instability and differing auditing, accounting and legal standards. Investments denominated in foreign currencies are subject to the risk that such currencies will decline in value relative to the U.S. dollar and affect the value of these investments held by the fund. |
| Technology Growth Portfolio | · Market risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Market risk: The value of the securities in which the fund invests may be affected by political, regulatory, economic and social developments, and developments that impact specific economic sectors, industries or segments of the market. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed-income markets may negatively affect many issuers, which could adversely affect the fund. Global economies and financial markets are becoming increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies world-wide. Local, regional or global events such as war, military conflicts, acts of terrorism, natural disasters, the spread of infectious illness or other public health issues, recessions, elevated levels of government debt, changes in trade regulation or economic sanctions, internal unrest and discord, or other events could have a significant impact on the fund and its investments. |
| Technology Growth Portfolio | · Liquidity risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Liquidity risk: When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities in a timely manner at or near their perceived value. In such a market, the value of such securities and the fund's share price may fall dramatically. Investments that are illiquid or that trade in lower volumes may be more difficult to value. Investments in foreign securities tend to have greater exposure to liquidity risk than domestic securities. |
| Technology Growth Portfolio | · Management risk | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Risk [Text Block] | oef_RiskTextBlock | · Management risk: The investment process used by the fund's sub-adviser could fail to achieve the fund's investment goal and cause your fund investment to lose value. |
| Technology Growth Portfolio | S&P 500® Index reflects no deductions for fees, expenses or taxes | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | S&P 500® Index |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 17.87% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 14.42% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 14.81% |
| Technology Growth Portfolio | NYSE® Technology Index reflects no deductions for fees, expenses or taxes | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Average Annual Return, Label [Optional Text] | oef_AverageAnnualReturnLabel | NYSE® Technology Index |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 38.68% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 15.43% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 22.15% |
| Technology Growth Portfolio | Initial Shares | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% |
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.00% |
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.07% |
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 0.82% |
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 84 |
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 262 |
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 455 |
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | $ 1,014 |
| Highest Quarterly Return, Label [Optional Text] | oef_HighestQuarterlyReturnLabel | Best Quarter |
| Highest Quarterly Return, Date | oef_BarChartHighestQuarterlyReturnDate | Jun. 30, 2020 |
| Highest Quarterly Return | oef_BarChartHighestQuarterlyReturn | 39.08% |
| Lowest Quarterly Return, Label [Optional Text] | oef_LowestQuarterlyReturnLabel | Worst Quarter |
| Lowest Quarterly Return, Date | oef_BarChartLowestQuarterlyReturnDate | Jun. 30, 2022 |
| Lowest Quarterly Return | oef_BarChartLowestQuarterlyReturn | (29.27%) |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 28.16% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 9.24% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 17.27% |
| Annual Return [Percent] | oef_AnnlRtrPct | 4.72% |
| Annual Return [Percent] | oef_AnnlRtrPct | 42.64% |
| Annual Return [Percent] | oef_AnnlRtrPct | (0.98%) |
| Annual Return [Percent] | oef_AnnlRtrPct | 25.82% |
| Annual Return [Percent] | oef_AnnlRtrPct | 69.92% |
| Annual Return [Percent] | oef_AnnlRtrPct | 12.93% |
| Annual Return [Percent] | oef_AnnlRtrPct | (46.39%) |
| Annual Return [Percent] | oef_AnnlRtrPct | 59.42% |
| Annual Return [Percent] | oef_AnnlRtrPct | 25.74% |
| Annual Return [Percent] | oef_AnnlRtrPct | 28.16% |
| Technology Growth Portfolio | Service Shares | ||
| Risk/Return: | oef_RiskReturnAbstract | |
| Management Fees (as a percentage of Assets) | oef_ManagementFeesOverAssets | 0.75% |
| Distribution and Service (12b-1) Fees | oef_DistributionAndService12b1FeesOverAssets | 0.25% |
| Other Expenses (as a percentage of Assets): | oef_OtherExpensesOverAssets | 0.07% |
| Expenses (as a percentage of Assets) | oef_ExpensesOverAssets | 1.07% |
| Expense Example, with Redemption, 1 Year | oef_ExpenseExampleYear01 | $ 109 |
| Expense Example, with Redemption, 3 Years | oef_ExpenseExampleYear03 | 340 |
| Expense Example, with Redemption, 5 Years | oef_ExpenseExampleYear05 | 590 |
| Expense Example, with Redemption, 10 Years | oef_ExpenseExampleYear10 | $ 1,306 |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 27.87% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 8.96% |
| Average Annual Return, Percent | oef_AvgAnnlRtrPct | 16.97% |