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Lazard Global Dynamic Multi-Asset Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Lazard Global Dynamic Multi-Asset Portfolio
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return.

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 and hold shares of the Portfolio, a series of The Lazard Funds, Inc. (the “Fund”). Investors transacting in Institutional or R6 shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

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 01, 2020
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 and may result in higher taxes when Portfolio shares are held in a taxable account. 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 120% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 120.00%
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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Investment Manager allocates the Portfolio’s assets among various US and non-US equity and fixed-income strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors designed to estimate probabilities, including volatility. The Investment Manager makes allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models and input from the Investment Manager?s research analysts. At any given time the Portfolio?s assets may not be allocated to all strategies.


A principal component of the Investment Manager’s investment process for the Portfolio is volatility management. The Investment Manager generally will seek to achieve, over a full market cycle, a level of volatility in the Portfolio’s performance of approximately 10%. Volatility, a risk measurement, measures the magnitude of up and down fluctuations in the value of a financial instrument or index over time.


As a consequence of allocating its assets among various of the Investment Manager’s investment strategies, the Portfolio may: 


· invest in US and non-US equity and debt securities (including those of companies with business activities located in emerging market countries and securities issued by governments of such countries), depositary receipts and shares, currencies and related instruments, and structured notes 


· invest in exchange-traded open-end management investment companies (“ETFs”) and similar products, which generally pursue a passive index-based strategy


· invest in securities of companies of any size or market capitalization


· invest in debt securities of any maturity or duration 


· invest in securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (e.g., lower than Baa by Moody’s Investors Service, Inc. or lower than BBB by Standard & Poor’s Ratings Group) (“junk bonds”) or securities that are unrated 


· enter into swap agreements (including credit default swap agreements) and forward contracts, and may purchase and write put and covered call options, on securities, indexes and currencies, for hedging purposes (although it is not required to do so) or to seek to increase returns


Under normal market conditions, the Portfolio invests significantly (at least 40%—unless market conditions are not deemed favorable by the Investment Manager, in which case the Portfolio would invest at least 30%) in issuers organized or located outside the US or doing a substantial amount of business outside the US, securities denominated in a foreign currency or foreign currency forward contracts.

Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of your investment in the Portfolio will fluctuate, which means you could lose money.


Allocation Risk. The Portfolio’s ability to achieve its investment objective depends in part on the Investment Manager’s skill in determining the Portfolio’s allocation among the investment strategies. The Investment Manager’s evaluations and assumptions underlying its allocation decisions may differ from actual market conditions.


Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of a market, can affect the value of the Portfolio’s investments. 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.


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.


Volatility Management Risk. While the Investment Manager generally will seek to achieve, over a full market cycle, the level of volatility in the Portfolio’s performance as described above, there can be no guarantee that this will be achieved; actual or realized volatility for any particular period may be materially higher or lower depending on market conditions. In addition, the Investment Manager’s efforts to manage the Portfolio’s volatility can be expected, in a period of generally positive equity market returns, to reduce the Portfolio’s performance below what could be achieved without seeking to manage volatility and, thus, the Portfolio would generally be expected to underperform market indices that do not seek to achieve a specified level of volatility.


Value Investing and Growth Investing Risks. The Portfolio invests a portion of its assets in securities believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The Portfolio also invests a portion of its assets in securities believed by the Investment Manager to have the potential for growth, but that may not realize such perceived potential for extended periods of time or may never realize such perceived growth potential. Such securities may be more volatile than other securities because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The securities in which the Portfolio invests may respond differently to market and other developments than other types of securities.


Quantitative Model Risk. A quantitative model, such as the risk and other models used by the Investment Manager requires adherence to a systematic, disciplined process. The Investment Manager’s ability to monitor and, if necessary, adjust its quantitative model could be adversely affected by various factors including incorrect or outdated market and other data inputs. Factors that affect a security’s value can change over time, and these changes may not be reflected in the quantitative model. In addition, factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.


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.


Emerging Market Risk. Emerging market countries generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. The economies of countries with emerging markets may be based predominantly on only a few industries, may be highly vulnerable to changes in local or global trade conditions, and may suffer from extreme debt burdens or volatile inflation rates. The securities markets of emerging market countries have historically been extremely volatile. These market conditions may continue or worsen. Significant devaluation of emerging market currencies against the US dollar may occur subsequent to acquisition of investments denominated in emerging market currencies.


Foreign Currency Risk. 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. The Portfolio’s investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies. The Investment Manager does not intend to actively hedge the Portfolio’s foreign currency exposure.


Fixed-Income and Debt Securities Risk. The market value of a debt security may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. The debt securities market can be susceptible to increases in volatility and decreases in liquidity. Liquidity can decline unpredictably in response to overall economic conditions or credit tightening.


Prices of bonds and other debt securities tend to move inversely with changes in interest rates. Interest rate risk is usually greater for fixed-income securities with longer maturities or durations. A rise in interest rates (or the expectation of a rise in interest rates) may result in periods of volatility, decreased liquidity and increased redemptions, and, as a result, the Portfolio may have to liquidate portfolio securities at disadvantageous prices. Risks associated with rising interest rates are heightened given that the Federal Reserve has raised the federal funds rate several times in recent periods and may continue to increase rates in the future.


The Portfolio’s investments in lower-rated, higher-yielding securities (“junk bonds”) are subject to greater credit risk than its higher rated investments. Credit risk is the risk that the issuer will not make interest or principal payments, or will not make payments on a timely basis. Non-investment grade securities tend to be more volatile, less liquid and are considered speculative. If there is a decline, or perceived decline, in the credit quality of a debt security (or any guarantor of payment on such security), the security’s value could fall, potentially lowering the Portfolio’s share price. The prices of non-investment grade securities, unlike investment grade debt securities, may fluctuate unpredictably and not necessarily inversely with changes in interest rates. The market for these securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline.


Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds of called or redeemed securities in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).


Structured notes are privately negotiated debt instruments where the principal and/or interest is determined by reference to a specified asset, market or rate, or the differential performance of two assets or markets. Structured notes can have risks of both debt securities and derivatives transactions.


ETF Risk. Shares of ETFs may trade at prices that vary from their net asset values, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent net asset value. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. The Portfolio’s investments in ETFs are subject to the risks of such ETF’s investments, as well as to the general risks of investing in ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of the ETFs in which the Portfolio invests. The Portfolio may be limited by the Investment Company Act of 1940, as amended, in the amount of its assets that may be invested in ETFs unless an ETF has received an exemptive order from the Securities and Exchange Commission on which the Portfolio may rely or an exemption is available.


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.


Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities and other investments at the time and price it would like. The size of certain securities offerings of emerging markets issuers may be relatively smaller in size than offerings in more developed markets and, in some cases, the Portfolio, by itself or together with other Portfolios or other accounts managed by the Investment Manager, may hold a position in a security that is large relative to the typical trading volume for that security; these factors can make it difficult for the Portfolio to dispose of the position at the desired time or price.


Derivatives and Hedging Risk. Derivatives transactions, including those entered into for hedging purposes (i.e., seeking to protect Portfolio investments), may increase volatility, reduce returns, limit gains or magnify losses, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested. Swap agreements, forward currency contracts, over-the-counter options on securities, indexes and currencies, structured notes and other over-the-counter derivatives transactions are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. These derivatives transactions, as well as the exchange-traded futures and options in which the Portfolio may invest, are subject to many of the risks of, and can be highly sensitive to changes in the value of the related security, index or currency. As such, a small investment could have a potentially large impact on the Portfolio?s performance. In fact, many derivatives may be subject to greater risks than those associated with investing directly in the underlying or other reference asset. Derivatives transactions incur costs, either explicitly or implicitly, which reduce returns, and costs of engaging in such transactions may outweigh any gains or any losses averted from hedging activities. Successful use of derivatives, whether for hedging or for other investment purposes, is subject to the Investment Manager?s ability to predict correctly movements in the direction of the relevant reference asset or market and, for hedging activities, correlation of the derivative instruments used with the investments seeking to be hedged. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.


High Portfolio Turnover Risk. The Portfolio’s investment strategy may involve high portfolio turnover (such as 100% or more). A portfolio turnover rate of 100%, for example, is equivalent to the Portfolio buying and selling all of its securities once during the course of the year. A high portfolio turnover rate could result in high transaction costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders, which will reduce returns to shareholders.


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.

Risk Lose Money [Text] rr_RiskLoseMoney The value of your investment in the Portfolio will fluctuate, which means you could lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Dynamic Multi-Asset Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.lazardassetmanagement.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

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 Global Dynamic Multi-Asset Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures 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 (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
  

Best Quarter:

Q1 17

5.60%

 

 

Worst Quarter:

Q4 18

-9.19%

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2017
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 5.60%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (9.19%)
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2018)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expense, or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary. After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. Returns shown below for the Portfolio's R6 Shares (which were not operational as of December 31, 2018) reflect the performance of the Portfolio's Institutional Shares. R6 Shares would have had substantially similar returns as Institutional Shares because the share classes are invested in the same portfolio of securities, and the returns would differ only to the extent that the classes do not have the same expenses.

Lazard Global Dynamic Multi-Asset Portfolio | MSCI World Index (reflects no deduction for fees, expense or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (8.71%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 6.52%
Lazard Global Dynamic Multi-Asset Portfolio | 50% MSCI World Index / 50% Bloomberg Barclays Global Aggregate Index (reflects no deduction for fees, expense or taxes)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (4.79%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 3.82%
Lazard Global Dynamic Multi-Asset Portfolio | Institutional Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.54%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.34%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.44% [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.90%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 92
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 381
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 692
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,574
Annual Return 2017 rr_AnnualReturn2017 20.69%
Annual Return 2018 rr_AnnualReturn2018 (6.35%)
1 Year rr_AverageAnnualReturnYear01 (6.35%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 5.04%
Inception Date rr_AverageAnnualReturnInceptionDate May 27, 2016
Lazard Global Dynamic Multi-Asset Portfolio | Institutional Shares | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (9.93%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 2.73%
Lazard Global Dynamic Multi-Asset Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.10%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 3.41%
Lazard Global Dynamic Multi-Asset Portfolio | Open Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 3.15%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 4.20%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 3.05% [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 1.15%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 117
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 997
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 1,890
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 4,187
1 Year rr_AverageAnnualReturnYear01 (6.64%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 4.72%
Inception Date rr_AverageAnnualReturnInceptionDate May 27, 2016
Lazard Global Dynamic Multi-Asset Portfolio | R6 Shares  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.80%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.54% [2]
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.34%
Fee Waiver and/or Expense Reimbursement rr_FeeWaiverOrReimbursementOverAssets 0.44% [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.90%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates “Other Expenses” are based on estimated amounts for the current fiscal year, using “Other Expenses” for Institutional Shares from the last fiscal year.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 92
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 381
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 692
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,574
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess Returns shown below for the Portfolio's R6 Shares (which were not operational as of December 31, 2018) reflect the performance of the Portfolio's Institutional Shares.
1 Year rr_AverageAnnualReturnYear01 (6.35%)
Life of Portfolio rr_AverageAnnualReturnSinceInception 5.04%
[1] Reflects a contractual agreement by Lazard Asset Management LLC (the "Investment Manager") to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2020, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.15% and .90% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses. This expense limitation agreement can only be amended by agreement of the Fund, upon approval by the Fund's Board of Directors, and the Investment Manager to lower the net amount shown and will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.
[2] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.