| Label | Element | Value | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lazard Retirement US Small Cap Equity Select Portfolio | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk/Return [Heading] | rr_RiskReturnHeading | Lazard Retirement US Small Cap Equity Select Portfolio | |||||||||||||
| Objective [Heading] | rr_ObjectiveHeading | Investment Objective | |||||||||||||
| Objective, Primary [Text Block] | rr_ObjectivePrimaryTextBlock | The Portfolio seeks long-term capital appreciation. |
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| Expense [Heading] | rr_ExpenseHeading | Fees and Expenses | |||||||||||||
| Expense Narrative [Text Block] | rr_ExpenseNarrativeTextBlock | This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Portfolio, a series of Lazard Retirement Series, Inc. (the “Fund”), but does not reflect the fees or charges imposed by the separate accounts of certain insurance companies (the “Participating Insurance Companies”) under variable annuity contracts or variable life insurance policies (the “Policies” and each, a “Policy”). If such fees and charges were reflected, the figures in the table would be higher. |
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| Operating Expenses Caption [Text] | rr_OperatingExpensesCaption | Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination | May 1, 2026 | |||||||||||||
| Portfolio Turnover [Heading] | rr_PortfolioTurnoverHeading | Portfolio Turnover | |||||||||||||
| Portfolio Turnover [Text Block] | rr_PortfolioTurnoverTextBlock | The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 98% of the average value of its portfolio. |
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| Portfolio Turnover, Rate | rr_PortfolioTurnoverRate | 98.00% | |||||||||||||
| Expense Example [Heading] | rr_ExpenseExampleHeading | Example | |||||||||||||
| Expense Example Narrative [Text Block] | rr_ExpenseExampleNarrativeTextBlock | This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio 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 Portfolio’s operating expenses remain the same, giving effect to the expense limitation agreement in year one only. The Example does not reflect fees and expenses imposed by the Participating Insurance Companies under the 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: |
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| Strategy [Heading] | rr_StrategyHeading | Principal Investment Strategies | |||||||||||||
| Strategy Narrative [Text Block] | rr_StrategyNarrativeTextBlock | The Portfolio invests primarily in equity securities, principally common stocks, of small cap US companies. The Investment Manager, through its bottom-up, fundamental research process, invests in companies it believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “small cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell 2000® Index (ranging from approximately $5.2 million to $15.0 billion as of March 31, 2025). Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap US companies. The Investment Manager focuses on relative value in seeking to construct a diversified portfolio of investments for the Portfolio that maintains sector and industry balance, using investment opportunities identified through bottom-up fundamental research conducted by the Investment Manager’s small cap and global research analysts. The Portfolio may invest up to 20% of its assets in the securities of larger or smaller US or non-US companies. |
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| Risk [Heading] | rr_RiskHeading | Principal Investment Risks | |||||||||||||
| Bar Chart and Performance Table [Heading] | rr_BarChartAndPerformanceTableHeading | Performance Bar Chart and Table | |||||||||||||
| Performance Narrative [Text Block] | rr_PerformanceNarrativeTextBlock | The accompanying bar chart and table provide some indication of the risks of investing in Lazard Retirement US Small Cap Equity Select Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance. The bar chart shows how the performance of the Portfolio’s Service Shares has varied from year to year over the past 10 calendar years. Effective September 1, 2023, certain changes were made to the Portfolio’s principal investments strategies, including removing mid-capitalization companies from its policy with respect to the investment of 80% of its assets. The Portfolio’s performance information prior to September 1, 2023 relates only to the Portfolio’s prior principal investment strategies. Performance information does not reflect the fees or charges imposed by the Participating Insurance Companies under the Policies, and such fees will have the effect of reducing performance. Updated performance information is available at www.lazardassetmanagement.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future. As a new share Class, past performance information is not available for Investor Shares as of the date of this Prospectus. Investor Shares would have had annual returns substantially similar to those of Service Shares because the shares are invested in the same portfolio of securities, and the annual returns would differ only to the extent of the different expense ratios of the Classes. |
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| Performance Information Illustrates Variability of Returns [Text] | rr_PerformanceInformationIllustratesVariabilityOfReturns | The accompanying bar chart and table provide some indication of the risks of investing in Lazard Retirement US Small Cap Equity Select Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance. | |||||||||||||
| Performance Availability Phone [Text] | rr_PerformanceAvailabilityPhone | (800) 823-6300 | |||||||||||||
| Performance Availability Website Address [Text] | rr_PerformanceAvailabilityWebSiteAddress | www.lazardassetmanagement.com | |||||||||||||
| Performance Past Does Not Indicate Future [Text] | rr_PerformancePastDoesNotIndicateFuture | The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future. | |||||||||||||
| Bar Chart [Heading] | rr_BarChartHeading | Year-by-Year Total Returns for Service Shares As of 12/31 | |||||||||||||
| Bar Chart Does Not Reflect Sales Loads [Text] | rr_BarChartDoesNotReflectSalesLoads | performance information prior to September 1, 2023 relates only to the Portfolio’s prior principal investment strategies. Performance information does not reflect the fees or charges imposed by the Participating Insurance Companies under the Policies, and such fees will have the effect of reducing performance. | |||||||||||||
| Bar Chart Closing [Text Block] | rr_BarChartClosingTextBlock |
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| Performance Table Heading | rr_PerformanceTableHeading | Average Annual Total Returns (for the periods ended December 31, 2024) | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Principal Investment Risks | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Principal Investment Risks The value of your investment in the Portfolio will fluctuate, which means you could lose money. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Risk Lose Money [Member] | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | The value of your investment in the Portfolio will fluctuate, which means you could lose money. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Market Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Market Risk: The Portfolio may incur losses due to declines in one or more markets in which it invests. These declines may be the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s). To the extent that such developments impact specific industries, market sectors, countries or geographic regions, the Portfolio’s investments in such industries, market sectors, countries and/or geographic regions can be expected to be particularly affected, especially if such investments are a significant portion of its investment portfolio. 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 Portfolio. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers worldwide. As a result, local, regional or global events such as war or military conflict, acts of terrorism, the spread of infectious illness or other public health issues, social unrest, natural disasters, extreme weather, other geological events, man-made disasters, supply chain disruptions, deflation, inflation, government defaults, government shutdowns, the imposition of sanctions or other similar measures, recessions or other events could have a significant negative impact on global economic and market conditions. For example, a public health or other emergency and aggressive responses taken by many governments or voluntarily imposed by private parties, including closing borders, restricting travel and imposing prolonged quarantines or similar restrictions, as well as the closure of, or operational changes to, many retail and other businesses, may have severe negative impacts on markets worldwide. Additionally, general market conditions may affect the value of a Portfolio’s securities, including changes in interest rates, currency rates or monetary policies. Furthermore, the imposition of tariffs, trade restrictions, currency restrictions or similar actions (or retaliatory measures taken in response to such actions), or the threat or potential of one or more such events and developments, could lead to price volatility and overall declines in the US and global investment markets. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Issuer Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Issuer Risk: The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets or factors unrelated to the issuer’s value, such as investor perception. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Small and Mid Cap Companies Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Small and Mid Cap Companies Risk: Small and mid cap companies carry additional risks because their earnings tend to be less predictable, their share prices more volatile and their securities less liquid than larger, more established companies. The shares of small and mid cap companies tend to trade less frequently than those of larger companies, which can have an adverse effect on the pricing of these securities and on the ability to sell these securities when the Investment Manager deems it appropriate. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Value Investing Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Value Investing Risk: Value investments are believed by the Investment Manager to be undervalued, but may not realize their perceived value for extended periods of time or may never realize their perceived value. These securities may respond differently to market and other developments than other types of securities. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Non-US Securities Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Non-US Securities Risk: The Portfolio’s performance will be influenced by political, social and economic factors affecting the non-US countries and companies in which the Portfolio invests. Non-US securities carry special risks, such as less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. Non-US securities may be subject to economic sanctions or other governmental actions or developments, exchange controls (including repatriation restrictions), confiscations, trade restrictions (including tariffs) or problems related to share registration, trade settlement or asset custody, which could, among other things, effectively restrict or eliminate the Portfolio’s ability to purchase or sell certain foreign securities. To the extent the Portfolio holds securities subject to such actions, the securities may become difficult to value and/or less liquid (or illiquid). In some cases, the securities may become worthless. In addition, investments denominated in currencies other than US dollars may experience a decline in value, in US dollar terms, due solely to fluctuations in currency exchange rates. Emerging market countries can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Securities Selection Risk | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Risk [Text Block] | rr_RiskTextBlock | Securities Selection Risk: Securities and other investments selected by the Investment Manager for the Portfolio may not perform to expectations. This could result in the Portfolio’s underperformance compared to other funds with similar investment objectives or strategies. |
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| Lazard Retirement US Small Cap Equity Select Portfolio | Russell 3000 Index | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Index No Deduction for Fees, Expenses, Taxes [Text] | rr_IndexNoDeductionForFeesExpensesTaxes | (reflects no deduction for fees, expenses or taxes) | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Russell 3000 Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 23.81% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 13.86% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 12.55% | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Russell 2000 Index | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Index No Deduction for Fees, Expenses, Taxes [Text] | rr_IndexNoDeductionForFeesExpensesTaxes | (reflects no deduction for fees, expenses or taxes) | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Russell 2000 Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 11.54% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 7.40% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 7.82% | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Russell 2500 Index | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Index No Deduction for Fees, Expenses, Taxes [Text] | rr_IndexNoDeductionForFeesExpensesTaxes | (reflects no deduction for fees, expenses or taxes) | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Russell 2500 Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 12.00% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.77% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.85% | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Russell 2000/2500 Linked Index | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Index No Deduction for Fees, Expenses, Taxes [Text] | rr_IndexNoDeductionForFeesExpensesTaxes | (reflects no deduction for fees, expenses or taxes) | |||||||||||||
| Label | rr_AverageAnnualReturnLabel | Russell 2000/2500 Linked Index | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 11.54% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 8.74% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 8.83% | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Service | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.75% | |||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | 0.25% | |||||||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 0.35% | |||||||||||||
| Total Annual Portfolio Operating Expenses | rr_ExpensesOverAssets | 1.35% | |||||||||||||
| Fee Waiver and/or Expense Reimbursement | rr_FeeWaiverOrReimbursementOverAssets | 0.25% | [1] | ||||||||||||
| Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement | rr_NetExpensesOverAssets | 1.10% | |||||||||||||
| 1 Year | rr_ExpenseExampleYear01 | $ 112 | |||||||||||||
| 3 Years | rr_ExpenseExampleYear03 | 403 | |||||||||||||
| 5 Years | rr_ExpenseExampleYear05 | 715 | |||||||||||||
| 10 Years | rr_ExpenseExampleYear10 | $ 1,602 | |||||||||||||
| Annual Return 2015 | rr_AnnualReturn2015 | (2.38%) | |||||||||||||
| Annual Return 2016 | rr_AnnualReturn2016 | 15.78% | |||||||||||||
| Annual Return 2017 | rr_AnnualReturn2017 | 13.95% | |||||||||||||
| Annual Return 2018 | rr_AnnualReturn2018 | (13.24%) | |||||||||||||
| Annual Return 2019 | rr_AnnualReturn2019 | 29.93% | |||||||||||||
| Annual Return 2020 | rr_AnnualReturn2020 | 6.76% | |||||||||||||
| Annual Return 2021 | rr_AnnualReturn2021 | 19.87% | |||||||||||||
| Annual Return 2022 | rr_AnnualReturn2022 | (15.52%) | |||||||||||||
| Annual Return 2023 | rr_AnnualReturn2023 | 10.02% | |||||||||||||
| Annual Return 2024 | rr_AnnualReturn2024 | 11.12% | |||||||||||||
| Label | rr_HighestQuarterlyReturnLabel | Best Quarter | |||||||||||||
| Highest Quarterly Return, Date | rr_BarChartHighestQuarterlyReturnDate | Dec. 31, 2020 | |||||||||||||
| Highest Quarterly Return | rr_BarChartHighestQuarterlyReturn | 23.82% | |||||||||||||
| Label | rr_LowestQuarterlyReturnLabel | Worst Quarter | |||||||||||||
| Lowest Quarterly Return, Date | rr_BarChartLowestQuarterlyReturnDate | Mar. 31, 2020 | |||||||||||||
| Lowest Quarterly Return | rr_BarChartLowestQuarterlyReturn | (30.98%) | |||||||||||||
| 1 Year | rr_AverageAnnualReturnYear01 | 11.12% | |||||||||||||
| 5 Years | rr_AverageAnnualReturnYear05 | 5.74% | |||||||||||||
| 10 Years | rr_AverageAnnualReturnYear10 | 6.73% | |||||||||||||
| Inception Date | rr_AverageAnnualReturnInceptionDate | Nov. 04, 1997 | |||||||||||||
| Lazard Retirement US Small Cap Equity Select Portfolio | Investor | |||||||||||||||
| Risk/Return: | rr_RiskReturnAbstract | ||||||||||||||
| Management Fees | rr_ManagementFeesOverAssets | 0.75% | |||||||||||||
| Distribution and Service (12b-1) Fees | rr_DistributionAndService12b1FeesOverAssets | none | |||||||||||||
| Other Expenses | rr_OtherExpensesOverAssets | 0.35% | [2] | ||||||||||||
| Total Annual Portfolio Operating Expenses | rr_ExpensesOverAssets | 1.15% | |||||||||||||
| Fee Waiver and/or Expense Reimbursement | rr_FeeWaiverOrReimbursementOverAssets | 0.20% | [1] | ||||||||||||
| Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement | rr_NetExpensesOverAssets | 0.95% | |||||||||||||
| Other Expenses, New Fund, Based on Estimates [Text] | rr_OtherExpensesNewFundBasedOnEstimates | Based on estimated amounts for the current fiscal year, using amounts for Service Shares from the last fiscal year. | |||||||||||||
| 1 Year | rr_ExpenseExampleYear01 | $ 97 | |||||||||||||
| 3 Years | rr_ExpenseExampleYear03 | 346 | |||||||||||||
| 5 Years | rr_ExpenseExampleYear05 | 614 | |||||||||||||
| 10 Years | rr_ExpenseExampleYear10 | $ 1,380 | |||||||||||||
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