497

RULE 497 DOCUMENT

The interactive data file included as an exhibit to this filing relates to the as revised prospectus of The Lazard Funds, Inc. that was filed with the Securities and Exchange Commission pursuant to Rule 497(e) under the Securities Act of 1933, as amended, on September 11, 2017 (Accession No. 0000930413-17-003243), which is incorporated herein by reference.

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Document and Entity Information	Total
Prospectus:
Document Type	497
Document Period End Date	Dec. 31, 2016
Registrant Name	LAZARD FUNDS INC
Central Index Key	0000874964
Amendment Flag	false
Document Creation Date	Sep. 11, 2017
Document Effective Date	Sep. 11, 2017
Prospectus Date	May 01, 2017

XML

Lazard US Equity Concentrated Portfolio

Lazard US Equity Concentrated Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard US Equity Concentrated Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.70%	0.70%	0.70%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.07%	0.08%	14.68%
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		0.78%	1.04%	15.39%
Fee Waiver and Expense Reimbursement	[1]			14.61%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.78%	1.04%	0.78%	[1]

Example

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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard US Equity Concentrated Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	80	249	433	966
Open Shares	106	331	574	1,271
R6 Shares	80	249	433	966

Portfolio Turnover

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 84% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US companies of any market capitalization. The Portfolio has a concentrated portfolio of investments, typically investing in 15 to 35 companies with market capitalizations generally greater than $350 million. The Portfolio seeks to outperform broad-based securities market indices, such as the S&P 500® Index, the Russell 1000® Index and the Russell 3000® Index. The Investment Manager’s philosophy employed for the Portfolio is based on value creation through its process of bottom-up stock selection, and the Investment Manager implements a disciplined portfolio construction process. The Investment Manager’s fundamental research seeks to identify investments typically featuring robust organic cash flow, balance sheet strength and operational flexibility.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 20% of its assets in securities of non-US companies.

The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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. 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.

Non-Diversification Risk. The Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Concentration Risk. A Portfolio’s ability to concentrate its investments in as few as 15 companies may be limited by applicable requirements of the Internal Revenue Code of 1986, as amended (the “Code”), for qualification as a regulated investment company.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Equity Concentrated Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance (prior to the change in investment strategy described above) 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 over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 19.10%

Worst Quarter:
12/31/08 -21.54%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio’s investment strategy changed) and the S&P 500 Index for all periods thereafter.

Average Annual Returns - Lazard US Equity Concentrated Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	7.37%	15.64%	6.33%	9.79%	Sep. 30, 2005
Open Shares	7.06%	15.25%	6.01%	7.46%	Sep. 30, 2005
R6 Shares				0.17%	Nov. 15, 2016
After Taxes on Distributions | Institutional Shares	5.90%	13.49%	5.07%	6.44%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	4.88%	11.86%	4.65%	5.87%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	11.96%	14.66%	6.95%	7.74%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (R6)	11.96%	14.66%	6.95%	2.96%
Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	11.96%	14.24%	5.47%	6.85%
Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes) (R6)	11.96%	14.24%	5.47%

[1] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), Lazard Asset Management LLC (the "Investment Manager") has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .77%, 1.03% and .77% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard US Equity Concentrated Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard US Equity Concentrated Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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, 2018

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 84% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

84.00%

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. 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 Portfolio invests primarily in equity securities, principally common stocks, of US companies of any market capitalization. The Portfolio has a concentrated portfolio of investments, typically investing in 15 to 35 companies with market capitalizations generally greater than $350 million. The Portfolio seeks to outperform broad-based securities market indices, such as the S&P 500® Index, the Russell 1000® Index and the Russell 3000® Index. The Investment Manager’s philosophy employed for the Portfolio is based on value creation through its process of bottom-up stock selection, and the Investment Manager implements a disciplined portfolio construction process. The Investment Manager’s fundamental research seeks to identify investments typically featuring robust organic cash flow, balance sheet strength and operational flexibility.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 20% of its assets in securities of non-US companies.

The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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. 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.

Non-Diversification Risk. The Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Concentration Risk. A Portfolio’s ability to concentrate its investments in as few as 15 companies may be limited by applicable requirements of the Internal Revenue Code of 1986, as amended (the “Code”), for qualification as a regulated investment company.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 US Equity Concentrated Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance (prior to the change in investment strategy described above) 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 over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 US Equity Concentrated Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance (prior to the change in investment strategy described above) compared to that of broad measures of market performance.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio’s investment strategy changed) and the S&P 500 Index for all periods thereafter.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.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:
6/30/09 19.10%

Worst Quarter:
12/31/08 -21.54%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

19.10%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(21.54%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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.

The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio’s investment strategy changed) and the S&P 500 Index for all periods thereafter.

Lazard US Equity Concentrated Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.66%

10 Years

rr_AverageAnnualReturnYear10

6.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.74%

Lazard US Equity Concentrated Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.66%

10 Years

rr_AverageAnnualReturnYear10

6.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.96%

Lazard US Equity Concentrated Portfolio | Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.24%

10 Years

rr_AverageAnnualReturnYear10

5.47%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.85%

Lazard US Equity Concentrated Portfolio | Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.24%

10 Years

rr_AverageAnnualReturnYear10

5.47%

Lazard US Equity Concentrated Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.07%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.78%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.78%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 80

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

249

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

433

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 966

Annual Return 2007

rr_AnnualReturn2007

1.65%

Annual Return 2008

rr_AnnualReturn2008

(36.18%)

Annual Return 2009

rr_AnnualReturn2009

24.81%

Annual Return 2010

rr_AnnualReturn2010

12.00%

Annual Return 2011

rr_AnnualReturn2011

(1.47%)

Annual Return 2012

rr_AnnualReturn2012

16.83%

Annual Return 2013

rr_AnnualReturn2013

29.59%

Annual Return 2014

rr_AnnualReturn2014

18.88%

Annual Return 2015

rr_AnnualReturn2015

7.00%

Annual Return 2016

rr_AnnualReturn2016

7.37%

1 Year

rr_AverageAnnualReturnYear01

7.37%

5 Years

rr_AverageAnnualReturnYear05

15.64%

10 Years

rr_AverageAnnualReturnYear10

6.33%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.79%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2005

Lazard US Equity Concentrated Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.90%

5 Years

rr_AverageAnnualReturnYear05

13.49%

10 Years

rr_AverageAnnualReturnYear10

5.07%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.44%

Lazard US Equity Concentrated Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.88%

5 Years

rr_AverageAnnualReturnYear05

11.86%

10 Years

rr_AverageAnnualReturnYear10

4.65%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.87%

Lazard US Equity Concentrated Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.08%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.04%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.04%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 106

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

331

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

574

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,271

1 Year

rr_AverageAnnualReturnYear01

7.06%

5 Years

rr_AverageAnnualReturnYear05

15.25%

10 Years

rr_AverageAnnualReturnYear10

6.01%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.46%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2005

Lazard US Equity Concentrated Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

14.68%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

15.39%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

14.61%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.78%

^[1],[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 80

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

249

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

433

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 966

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.17%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 15, 2016

[1] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .77%, 1.03% and .77% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[2] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), Lazard Asset Management LLC (the "Investment Manager") has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.

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Lazard US Strategic Equity Portfolio

Lazard US Strategic Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard US Strategic Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.70%	0.70%	0.70%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.24%	1.18%	0.32%
Total Annual Portfolio Operating Expenses		0.94%	2.13%	1.02%
Fee Waiver and Expense Reimbursement	[1]	0.19%	1.08%	0.27%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.75%	1.05%	0.75%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard US Strategic Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	77	281	502	1,137
Open Shares	107	563	1,045	2,377
R6 Shares	77	298	537	1,223

Portfolio Turnover

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 68% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US companies that the Investment Manager believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. Although the Portfolio generally focuses on large cap companies, the market capitalizations of issuers in which the Portfolio invests may vary with market conditions and the Portfolio also may invest in mid cap and small cap companies.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 20% of its assets in securities of non-US companies.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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. 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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Strategic Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 16.46%

Worst Quarter:
12/31/08 -23.06%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

Average Annual Returns - Lazard US Strategic Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	9.70%	12.07%	5.37%	6.29%	Dec. 30, 2004
Open Shares	9.46%	11.74%	5.05%	5.99%	Dec. 30, 2004
R6 Shares	9.81%			6.29%	May 19, 2014
After Taxes on Distributions | Institutional Shares	8.82%	10.43%	4.15%	5.20%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	6.19%	9.51%	4.13%	4.97%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	11.96%	14.66%	6.95%	7.47%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (R6)	11.96%	14.66%	6.95%	9.18%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .75%, 1.05% and .75% 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 agreement can only be amended by agreement of the Fund, upon approval by the Fund's Board of Directors (the "Board"), 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.

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Label

Element

Value

Lazard US Strategic Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard US Strategic Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. 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, 2018

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 68% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

68.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of US companies that the Investment Manager believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. Although the Portfolio generally focuses on large cap companies, the market capitalizations of issuers in which the Portfolio invests may vary with market conditions and the Portfolio also may invest in mid cap and small cap companies.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 20% of its assets in securities of non-US companies.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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. 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.

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 US Strategic Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 US Strategic Equity 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.LazardNet.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:
6/30/09 16.46%

Worst Quarter:
12/31/08 -23.06%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.46%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(23.06%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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.

Lazard US Strategic Equity Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.66%

10 Years

rr_AverageAnnualReturnYear10

6.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.47%

Lazard US Strategic Equity Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.96%

5 Years

rr_AverageAnnualReturnYear05

14.66%

10 Years

rr_AverageAnnualReturnYear10

6.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.18%

Lazard US Strategic Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.94%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.19%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.75%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

281

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

502

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,137

Annual Return 2007

rr_AnnualReturn2007

0.33%

Annual Return 2008

rr_AnnualReturn2008

(35.43%)

Annual Return 2009

rr_AnnualReturn2009

28.12%

Annual Return 2010

rr_AnnualReturn2010

13.13%

Annual Return 2011

rr_AnnualReturn2011

1.65%

Annual Return 2012

rr_AnnualReturn2012

14.56%

Annual Return 2013

rr_AnnualReturn2013

28.38%

Annual Return 2014

rr_AnnualReturn2014

15.04%

Annual Return 2015

rr_AnnualReturn2015

(4.75%)

Annual Return 2016

rr_AnnualReturn2016

9.70%

1 Year

rr_AverageAnnualReturnYear01

9.70%

5 Years

rr_AverageAnnualReturnYear05

12.07%

10 Years

rr_AverageAnnualReturnYear10

5.37%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 30, 2004

Lazard US Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.82%

5 Years

rr_AverageAnnualReturnYear05

10.43%

10 Years

rr_AverageAnnualReturnYear10

4.15%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.20%

Lazard US Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.19%

5 Years

rr_AverageAnnualReturnYear05

9.51%

10 Years

rr_AverageAnnualReturnYear10

4.13%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.97%

Lazard US Strategic Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

1.18%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.13%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.08%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

563

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,045

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,377

1 Year

rr_AverageAnnualReturnYear01

9.46%

5 Years

rr_AverageAnnualReturnYear05

11.74%

10 Years

rr_AverageAnnualReturnYear10

5.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.99%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 30, 2004

Lazard US Strategic Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.32%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.02%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.27%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.75%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

298

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

537

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,223

1 Year

rr_AverageAnnualReturnYear01

9.81%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.29%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 19, 2014

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .75%, 1.05% and .75% 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 agreement can only be amended by agreement of the Fund, upon approval by the Fund's Board of Directors (the "Board"), 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.

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Lazard US Small-Mid Cap Equity Portfolio

Lazard US Small-Mid Cap Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard US Small-Mid Cap Equity Portfolio	Institutional Shares	Open Shares	R6 Shares
Management Fees	0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%	none
Other Expenses	0.15%	0.20%	0.15%	[1]
Total Annual Portfolio Operating Expenses	0.90%	1.20%	0.90%

Example

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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard US Small-Mid Cap Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	92	287	498	1,108
Open Shares	122	381	660	1,455
R6 Shares	92	287	498	1,108

Portfolio Turnover

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 91% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of small to mid cap US companies. The Investment Manager considers “small-mid 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 2500^® Index (ranging from approximately $16.5 million to $18.6 billion as of March 30, 2017).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small-mid 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, mid 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.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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. 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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Small-Mid Cap Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 28.30%

Worst Quarter:
9/30/11 -26.02%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000® Index for all periods through August 24, 2008 (when the Portfolio’s investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

Average Annual Returns - Lazard US Small-Mid Cap Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	16.20%	14.71%	7.77%	10.98%	Oct. 30, 1991
Open Shares	15.92%	14.35%	7.43%	8.32%	Jan. 30, 1997
R6 Shares	16.20%	14.71%	7.77%	10.98%
After Taxes on Distributions | Institutional Shares	15.36%	11.77%	5.82%	8.55%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	9.80%	11.05%	5.75%	8.52%
Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.59%	14.54%	7.69%	10.91%
Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Open)	17.59%	14.54%	7.69%	9.34%
Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.59%	14.54%	7.59%	9.99%
Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Open)	17.59%	14.54%	7.59%	8.43%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Label

Element

Value

Lazard US Small-Mid Cap Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard US Small-Mid Cap Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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)

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 91% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

91.00%

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. 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 Portfolio invests primarily in equity securities, principally common stocks, of small to mid cap US companies. The Investment Manager considers “small-mid 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 2500^® Index (ranging from approximately $16.5 million to $18.6 billion as of March 30, 2017).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small-mid 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, mid 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.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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. 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.

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 US Small-Mid Cap Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 US Small-Mid Cap Equity 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000® Index for all periods through August 24, 2008 (when the Portfolio’s investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.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:
6/30/09 28.30%

Worst Quarter:
9/30/11 -26.02%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

28.30%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.02%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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.

The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000® Index for all periods through August 24, 2008 (when the Portfolio’s investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

Lazard US Small-Mid Cap Equity Portfolio | Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.59%

5 Years

rr_AverageAnnualReturnYear05

14.54%

10 Years

rr_AverageAnnualReturnYear10

7.69%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.91%

Lazard US Small-Mid Cap Equity Portfolio | Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.59%

5 Years

rr_AverageAnnualReturnYear05

14.54%

10 Years

rr_AverageAnnualReturnYear10

7.69%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.34%

Lazard US Small-Mid Cap Equity Portfolio | Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.59%

5 Years

rr_AverageAnnualReturnYear05

14.54%

10 Years

rr_AverageAnnualReturnYear10

7.59%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.99%

Lazard US Small-Mid Cap Equity Portfolio | Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.59%

5 Years

rr_AverageAnnualReturnYear05

14.54%

10 Years

rr_AverageAnnualReturnYear10

7.59%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.43%

Lazard US Small-Mid Cap Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.15%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.90%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 92

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

287

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

498

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,108

Annual Return 2007

rr_AnnualReturn2007

(6.38%)

Annual Return 2008

rr_AnnualReturn2008

(34.46%)

Annual Return 2009

rr_AnnualReturn2009

55.47%

Annual Return 2010

rr_AnnualReturn2010

23.67%

Annual Return 2011

rr_AnnualReturn2011

(9.83%)

Annual Return 2012

rr_AnnualReturn2012

15.45%

Annual Return 2013

rr_AnnualReturn2013

35.81%

Annual Return 2014

rr_AnnualReturn2014

11.39%

Annual Return 2015

rr_AnnualReturn2015

(2.14%)

Annual Return 2016

rr_AnnualReturn2016

16.20%

1 Year

rr_AverageAnnualReturnYear01

16.20%

5 Years

rr_AverageAnnualReturnYear05

14.71%

10 Years

rr_AverageAnnualReturnYear10

7.77%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.98%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 30, 1991

Lazard US Small-Mid Cap Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.36%

5 Years

rr_AverageAnnualReturnYear05

11.77%

10 Years

rr_AverageAnnualReturnYear10

5.82%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.55%

Lazard US Small-Mid Cap Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.80%

5 Years

rr_AverageAnnualReturnYear05

11.05%

10 Years

rr_AverageAnnualReturnYear10

5.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.52%

Lazard US Small-Mid Cap Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.20%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.20%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

381

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

660

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,455

1 Year

rr_AverageAnnualReturnYear01

15.92%

5 Years

rr_AverageAnnualReturnYear05

14.35%

10 Years

rr_AverageAnnualReturnYear10

7.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.32%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 30, 1997

Lazard US Small-Mid Cap Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.15%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

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

287

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

498

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,108

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

16.20%

5 Years

rr_AverageAnnualReturnYear05

14.71%

10 Years

rr_AverageAnnualReturnYear10

7.77%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.98%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard International Equity Portfolio

Lazard International Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.09%	0.10%	0.11%
Total Annual Portfolio Operating Expenses		0.84%	1.10%	0.86%
Fee Waiver and Expense Reimbursement	[1]			0.06%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.84%	1.10%	0.80%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	86	268	466	1,037
Open Shares	110	330	550	1,100
R6 Shares	82	268	471	1,055

Portfolio Turnover

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 25% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI® Europe, Australasia and Far East (“EAFE®”) Index (ranging from approximately $2.0 billion to $243.8 billion as of March 30, 2017) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries and may invest up to 15% of the Portfolio’s assets in securities of companies whose principal business activities are located in emerging market countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 21.90%

Worst Quarter:
9/30/11 -17.77%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

Average Annual Returns - Lazard International Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	(4.18%)	6.68%	1.83%	5.61%	Oct. 29, 1991
Open Shares	(4.46%)	6.38%	1.52%	4.28%	Jan. 23, 1997
R6 Shares	(4.17%)			(4.71%)	Apr. 01, 2015
After Taxes on Distributions | Institutional Shares	(4.24%)	(2.34%)	1.70%	4.85%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	(1.99%)	5.50%	1.66%	4.58%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)	1.00%	6.53%	0.75%	4.93%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)	1.00%	6.53%	0.75%	4.36%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (R6)	1.00%	6.53%	0.75%	(2.66%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .85%, 1.15% and .80% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard International Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. 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, 2018

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 25% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

25.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI® Europe, Australasia and Far East (“EAFE®”) Index (ranging from approximately $2.0 billion to $243.8 billion as of March 30, 2017) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries and may invest up to 15% of the Portfolio’s assets in securities of companies whose principal business activities are located in emerging market countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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 International Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 International Equity 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.LazardNet.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:
6/30/09 21.90%

Worst Quarter:
9/30/11 -17.77%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

21.90%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(17.77%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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.

Lazard International Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.93%

Lazard International Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.36%

Lazard International Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.66%)

Lazard International Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.09%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.84%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.84%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 86

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

268

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

466

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,037

Annual Return 2007

rr_AnnualReturn2007

10.96%

Annual Return 2008

rr_AnnualReturn2008

(37.75%)

Annual Return 2009

rr_AnnualReturn2009

25.19%

Annual Return 2010

rr_AnnualReturn2010

8.04%

Annual Return 2011

rr_AnnualReturn2011

(7.17%)

Annual Return 2012

rr_AnnualReturn2012

22.70%

Annual Return 2013

rr_AnnualReturn2013

20.84%

Annual Return 2014

rr_AnnualReturn2014

(4.29%)

Annual Return 2015

rr_AnnualReturn2015

1.62%

Annual Return 2016

rr_AnnualReturn2016

(4.18%)

1 Year

rr_AverageAnnualReturnYear01

(4.18%)

5 Years

rr_AverageAnnualReturnYear05

6.68%

10 Years

rr_AverageAnnualReturnYear10

1.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.61%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 1991

Lazard International Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(4.24%)

5 Years

rr_AverageAnnualReturnYear05

(2.34%)

10 Years

rr_AverageAnnualReturnYear10

1.70%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.85%

Lazard International Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.99%)

5 Years

rr_AverageAnnualReturnYear05

5.50%

10 Years

rr_AverageAnnualReturnYear10

1.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.58%

Lazard International Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.10%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.10%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.10%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 110

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

330

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

550

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,100

1 Year

rr_AverageAnnualReturnYear01

(4.46%)

5 Years

rr_AverageAnnualReturnYear05

6.38%

10 Years

rr_AverageAnnualReturnYear10

1.52%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.28%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 23, 1997

Lazard International Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.11%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.86%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.06%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.80%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 82

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

268

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

471

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,055

1 Year

rr_AverageAnnualReturnYear01

(4.17%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.71%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Apr. 01, 2015

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .85%, 1.15% and .80% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard International Equity Select Portfolio

Lazard International Equity Select Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Equity Select Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		1.04%	1.59%	1.04%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		1.80%	2.60%	1.80%
Fee Waiver and Expense Reimbursement	[2]	0.74%	1.24%	0.79%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	1.06%	1.36%	1.01%

Example

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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Equity Select Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	108	359	629	1,400
Open Shares	138	452	788	1,738
R6 Shares	103	343	602	1,343

Portfolio Turnover

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 42% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, including depositary receipts such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”), and common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI All Country World Index ex-US (ranging from approximately $728.7 million to $275.7 billion as of March 30, 2017) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries, although the Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries in an amount up to the current emerging markets component of the MSCI All Country World Index ex-US plus 15%. The allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 18.73%

Worst Quarter:
9/30/11 -17.57%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio’s benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

Average Annual Returns - Lazard International Equity Select Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	(0.63%)	5.08%	0.43%	3.31%	May 31, 2001
Open Shares	(1.03%)	4.70%	0.09%	3.00%	May 31, 2001
R6 Shares	(0.63%)	5.08%	0.43%	3.31%
After Taxes on Distributions | Institutional Shares	(0.69%)	5.01%	(0.08%)	2.84%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	0.08%	4.21%	0.77%	3.08%
MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)	4.50%	5.00%	0.96%	4.87%
MSCI EAFE/All Country World Index ex-US Linked Index (reflects no deduction for fees, expenses or taxes)	4.50%	5.00%	(0.09%)	3.68%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, and from May 1, 2018 to May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.15%, 1.45% and 1.10% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.05%, 1.35% and 1.00% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard International Equity Select Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Equity Select Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 42% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

42.00%

Expense Example [Heading]

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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 fee waiver and expense reimbursement arrangement described above. 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 Portfolio invests primarily in equity securities, including depositary receipts such as American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”), and common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI All Country World Index ex-US (ranging from approximately $728.7 million to $275.7 billion as of March 30, 2017) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries, although the Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries in an amount up to the current emerging markets component of the MSCI All Country World Index ex-US plus 15%. The allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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]

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Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard International 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 International 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio’s benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
6/30/09 18.73%

Worst Quarter:
9/30/11 -17.57%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.73%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(17.57%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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

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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]

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After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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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, 2016) 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.

The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio’s benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

Lazard International Equity Select Portfolio | MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.50%

5 Years

rr_AverageAnnualReturnYear05

5.00%

10 Years

rr_AverageAnnualReturnYear10

0.96%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.87%

Lazard International Equity Select Portfolio | MSCI EAFE/All Country World Index ex-US Linked Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.50%

5 Years

rr_AverageAnnualReturnYear05

5.00%

10 Years

rr_AverageAnnualReturnYear10

(0.09%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.68%

Lazard International Equity Select Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.04%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.80%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.74%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.06%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

359

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

629

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,400

Annual Return 2007

rr_AnnualReturn2007

9.25%

Annual Return 2008

rr_AnnualReturn2008

(38.74%)

Annual Return 2009

rr_AnnualReturn2009

20.86%

Annual Return 2010

rr_AnnualReturn2010

8.49%

Annual Return 2011

rr_AnnualReturn2011

(7.14%)

Annual Return 2012

rr_AnnualReturn2012

21.59%

Annual Return 2013

rr_AnnualReturn2013

14.93%

Annual Return 2014

rr_AnnualReturn2014

(4.29%)

Annual Return 2015

rr_AnnualReturn2015

(3.63%)

Annual Return 2016

rr_AnnualReturn2016

(0.63%)

1 Year

rr_AverageAnnualReturnYear01

(0.63%)

5 Years

rr_AverageAnnualReturnYear05

5.08%

10 Years

rr_AverageAnnualReturnYear10

0.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.31%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 31, 2001

Lazard International Equity Select Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.69%)

5 Years

rr_AverageAnnualReturnYear05

5.01%

10 Years

rr_AverageAnnualReturnYear10

(0.08%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.84%

Lazard International Equity Select Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.08%

5 Years

rr_AverageAnnualReturnYear05

4.21%

10 Years

rr_AverageAnnualReturnYear10

0.77%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.08%

Lazard International Equity Select Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

1.59%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.60%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.36%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 138

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

452

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

788

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,738

1 Year

rr_AverageAnnualReturnYear01

(1.03%)

5 Years

rr_AverageAnnualReturnYear05

4.70%

10 Years

rr_AverageAnnualReturnYear10

0.09%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.00%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 31, 2001

Lazard International Equity Select Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.04%

^[3]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.80%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.79%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.01%

^[2]

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

$ 103

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

343

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

602

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,343

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

(0.63%)

5 Years

rr_AverageAnnualReturnYear05

5.08%

10 Years

rr_AverageAnnualReturnYear10

0.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.31%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, and from May 1, 2018 to May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.15%, 1.45% and 1.10% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.05%, 1.35% and 1.00% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard International Equity Advantage Portfolio

Lazard International Equity Advantage Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Equity Advantage Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.65%	0.65%	0.65%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		12.47%	24.95%	12.47%	[1]
Total Annual Portfolio Operating Expenses		13.12%	25.85%	13.12%
Fee Waiver and Expense Reimbursement	[2]	12.22%	24.65%	12.27%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.90%	1.20%	0.85%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Equity Advantage Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	92	2,606	4,729	8,699
Open Shares	122	4,428	7,126	10,244
R6 Shares	87	2,602	4,726	8,698

Portfolio Turnover

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 92% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US and non-US companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. The Portfolio management team selects investments for the Portfolio from a broad investment universe of non-US stocks and depositary receipts, including ADRs, GDRs and European Depositary Receipts (“EDRs”), real estate investment trusts (“REITs”), warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Portfolio will typically focus on securities of non-US developed market companies, using an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. The allocation of the Portfolio’s assets among countries and regions will vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

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

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the Securities and Exchange Commission (the “SEC”) on which the Portfolio may rely or an exemption is available.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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.

Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/16 5.97%

Worst Quarter:
9/30/15 -9.31%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard International Equity Advantage Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	(1.13%)	(4.89%)	May 29, 2015
Open Shares	(1.42%)	(5.17%)	May 29, 2015
R6 Shares	(1.13%)	(4.89%)
After Taxes on Distributions | Institutional Shares	(1.39%)	(5.25%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	0.02%	(3.28%)
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes)	1.00%	(4.97%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.20% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard International Equity Advantage Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard International Equity Advantage Portfolio

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The Portfolio seeks long-term capital appreciation.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional 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, 2018

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 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Portfolio invests primarily in equity securities, principally common stocks, of US and non-US companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. The Portfolio management team selects investments for the Portfolio from a broad investment universe of non-US stocks and depositary receipts, including ADRs, GDRs and European Depositary Receipts (“EDRs”), real estate investment trusts (“REITs”), warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Portfolio will typically focus on securities of non-US developed market companies, using an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. The allocation of the Portfolio’s assets among countries and regions will vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

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

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the Securities and Exchange Commission (the “SEC”) on which the Portfolio may rely or an exemption is available.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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]

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

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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 International Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
9/30/16 5.97%

Worst Quarter:
9/30/15 -9.31%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.97%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(9.31%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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]

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After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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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, 2016) 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 International Equity Advantage Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.97%)

Lazard International Equity Advantage Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

12.47%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

13.12%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

12.22%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.90%

^[1]

Expense Example, with Redemption, 1 Year

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$ 92

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,606

Expense Example, with Redemption, 5 Years

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4,729

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 8,699

Annual Return 2016

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(1.13%)

1 Year

rr_AverageAnnualReturnYear01

(1.13%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.89%)

Inception Date

rr_AverageAnnualReturnInceptionDate

May 29, 2015

Lazard International Equity Advantage Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.39%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.25%)

Lazard International Equity Advantage Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.02%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.28%)

Lazard International Equity Advantage Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

24.95%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

25.85%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

24.65%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.20%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

4,428

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

7,126

Expense Example, with Redemption, 10 Years

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$ 10,244

1 Year

rr_AverageAnnualReturnYear01

(1.42%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.17%)

Inception Date

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May 29, 2015

Lazard International Equity Advantage Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

12.47%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

13.12%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

12.27%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.85%

^[1]

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

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$ 87

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,602

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

4,726

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 8,698

Performance One Year or Less [Text]

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Returns shown below for the Portfolio’s R6 Shares (which were not operational as of December 31, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

(1.13%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.89%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.20% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard International Equity Concentrated Portfolio

Lazard International Equity Concentrated Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Equity Concentrated Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.90%	0.90%	0.90%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		1.39%	10.83%	1.39%	[1]
Total Annual Portfolio Operating Expenses		2.29%	11.98%	2.29%
Fee Waiver and Expense Reimbursement	[2]	1.24%	10.63%	2.29%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.05%	1.35%	1.00%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Equity Concentrated Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	107	596	1,112	2,529
Open Shares	137	2,541	4,452	8,354
R6 Shares	102	591	1,108	2,525

Portfolio Turnover

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 92% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies. The Portfolio has a concentrated portfolio of investments, typically investing in 20 to 30 securities of non-US companies, including those whose principal business activities are located in emerging market countries. The Investment Manager seeks to realize the Portfolio’s investment objective primarily through stock selection, investing in companies believed to have sustainably high or improving returns and trading at attractive valuations. In choosing stocks for the Portfolio, the Investment Manager generally looks for established companies in economically developed countries that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager also may invest the Portfolio’s assets in securities of companies domiciled in emerging market countries in an amount up to the current percentage of securities in the MSCI All Country World Index ex-US issued by companies domiciled in emerging market countries (23.58% as of March 30, 2017) plus 15%. The Portfolio may invest in securities of companies across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing Risk. The Portfolio generally invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Concentration Risk. A Portfolio’s ability to concentrate its investments in as few as 15 companies may be limited by applicable requirements of the Code, for qualification as a regulated investment company.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Equity Concentrated 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
3/31/16 4.84%

Worst Quarter:
9/30/15 -15.40%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard International Equity Concentrated Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	4.74%	(5.37%)	Aug. 29, 2014
Open Shares	4.41%	(5.58%)	Aug. 29, 2014
R6 Shares	4.74%	(5.37%)
After Taxes on Distributions | Institutional Shares	4.55%	(5.51%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	3.14%	(3.93%)
MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)	4.50%	(4.34%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares for the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard International Equity Concentrated Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Equity Concentrated Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of non-US companies. The Portfolio has a concentrated portfolio of investments, typically investing in 20 to 30 securities of non-US companies, including those whose principal business activities are located in emerging market countries. The Investment Manager seeks to realize the Portfolio’s investment objective primarily through stock selection, investing in companies believed to have sustainably high or improving returns and trading at attractive valuations. In choosing stocks for the Portfolio, the Investment Manager generally looks for established companies in economically developed countries that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager also may invest the Portfolio’s assets in securities of companies domiciled in emerging market countries in an amount up to the current percentage of securities in the MSCI All Country World Index ex-US issued by companies domiciled in emerging market countries (23.58% as of March 30, 2017) plus 15%. The Portfolio may invest in securities of companies across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing Risk. The Portfolio generally invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Concentration Risk. A Portfolio’s ability to concentrate its investments in as few as 15 companies may be limited by applicable requirements of the Code, for qualification as a regulated investment company.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 International Equity Concentrated 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 International Equity Concentrated 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.LazardNet.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:
3/31/16 4.84%

Worst Quarter:
9/30/15 -15.40%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

4.84%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(15.40%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 International Equity Concentrated Portfolio | MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.34%)

Lazard International Equity Concentrated Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.39%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.29%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

596

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,112

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,529

Annual Return 2015

rr_AnnualReturn2015

(12.06%)

Annual Return 2016

rr_AnnualReturn2016

(4.74%)

1 Year

rr_AverageAnnualReturnYear01

4.74%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.37%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 29, 2014

Lazard International Equity Concentrated Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.55%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.51%)

Lazard International Equity Concentrated Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.93%)

Lazard International Equity Concentrated Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

10.83%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

11.98%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

10.63%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.35%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 137

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,541

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

4,452

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 8,354

1 Year

rr_AverageAnnualReturnYear01

4.41%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.58%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 29, 2014

Lazard International Equity Concentrated Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.39%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.29%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

2.29%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

^[1]

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 for the last fiscal year.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

591

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,108

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,525

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

4.74%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.37%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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 for the last fiscal year.

XML

Lazard International Strategic Equity Portfolio

Lazard International Strategic Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Strategic Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.06%	0.06%	0.07%
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		0.82%	1.07%	0.83%
Fee Waiver and Expense Reimbursement	[1]			0.01%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.82%	1.07%	0.82%	[1]

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Strategic Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	84	262	455	1,014
Open Shares	109	340	590	1,306
R6 Shares	84	262	455	1,014

Portfolio Turnover

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 47% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in countries represented by the MSCI EAFE Index that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Portfolio also may invest up to 15% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The countries represented by the MSCI EAFE Index currently include: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland and the United Kingdom.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Strategic Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 23.21%

Worst Quarter:
9/30/11 -19.36%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

Average Annual Returns - Lazard International Strategic Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	(5.17%)	7.49%	2.53%	5.13%	Oct. 31, 2005
Open Shares	(5.37%)	7.24%	2.23%	3.60%	Feb. 03, 2006
R6 Shares	(5.17%)			(3.55%)	Jan. 19, 2015
After Taxes on Distributions | Institutional Shares	(5.31%)	7.21%	2.18%	4.68%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	(2.42%)	6.08%	2.19%	4.32%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)	1.00%	6.53%	0.75%	3.44%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)	1.00%	6.53%	0.75%	2.31%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (R6)	1.00%	6.53%	0.75%	1.04%

[1] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), the Investment Manager has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .81%, 1.06% and .81% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard International Strategic Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Strategic Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. 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, 2018

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 47% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in countries represented by the MSCI EAFE Index that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Portfolio also may invest up to 15% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The countries represented by the MSCI EAFE Index currently include: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland and the United Kingdom.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 International Strategic Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 International Strategic Equity 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.LazardNet.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:
6/30/09 23.21%

Worst Quarter:
9/30/11 -19.36%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

23.21%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(19.36%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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.

Lazard International Strategic Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.44%

Lazard International Strategic Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.31%

Lazard International Strategic Equity Portfolio | MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.00%

5 Years

rr_AverageAnnualReturnYear05

6.53%

10 Years

rr_AverageAnnualReturnYear10

0.75%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.04%

Lazard International Strategic Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.06%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.82%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.82%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 84

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

262

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

455

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,014

Annual Return 2007

rr_AnnualReturn2007

12.88%

Annual Return 2008

rr_AnnualReturn2008

(39.98%)

Annual Return 2009

rr_AnnualReturn2009

27.76%

Annual Return 2010

rr_AnnualReturn2010

14.43%

Annual Return 2011

rr_AnnualReturn2011

(9.70%)

Annual Return 2012

rr_AnnualReturn2012

25.00%

Annual Return 2013

rr_AnnualReturn2013

25.02%

Annual Return 2014

rr_AnnualReturn2014

(1.48%)

Annual Return 2015

rr_AnnualReturn2015

(1.70%)

Annual Return 2016

rr_AnnualReturn2016

(5.17%)

1 Year

rr_AverageAnnualReturnYear01

(5.17%)

5 Years

rr_AverageAnnualReturnYear05

7.49%

10 Years

rr_AverageAnnualReturnYear10

2.53%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.13%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2005

Lazard International Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(5.31%)

5 Years

rr_AverageAnnualReturnYear05

7.21%

10 Years

rr_AverageAnnualReturnYear10

2.18%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.68%

Lazard International Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(2.42%)

5 Years

rr_AverageAnnualReturnYear05

6.08%

10 Years

rr_AverageAnnualReturnYear10

2.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.32%

Lazard International Strategic Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.06%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.07%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.07%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 109

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

340

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

590

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,306

1 Year

rr_AverageAnnualReturnYear01

(5.37%)

5 Years

rr_AverageAnnualReturnYear05

7.24%

10 Years

rr_AverageAnnualReturnYear10

2.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.60%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2006

Lazard International Strategic Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.07%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.83%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.82%

^[1],[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 84

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

262

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

455

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,014

1 Year

rr_AverageAnnualReturnYear01

(5.17%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.55%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 19, 2015

[1] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .81%, 1.06% and .81% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[2] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), the Investment Manager has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.

XML

Lazard International Small Cap Equity Portfolio

Lazard International Small Cap Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard International Small Cap Equity Portfolio	Institutional Shares	Open Shares	R6 Shares
Management Fees	0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%	none
Other Expenses	0.31%	0.30%	0.31%	[1]
Total Annual Portfolio Operating Expenses	1.06%	1.30%	1.06%

Example

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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard International Small Cap Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	108	337	585	1,294
Open Shares	132	412	713	1,568
R6 Shares	108	337	585	1,294

Portfolio Turnover

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 63% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of relatively small non-US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “small non-US companies” to be those non-US companies with market capitalizations, at the time of initial purchase by the Portfolio, below $5 billion or in the range of companies included in the MSCI EAFE Small Cap Index (based on market capitalization of the Index as a whole, which ranged from approximately $136.9 million to $8.4 billion as of March 30, 2017).

In choosing stocks for the Portfolio, the Investment Manager looks for smaller, well-managed non-US companies that the Investment Manager believes have the potential for growth. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap companies.

The Portfolio may invest up to 25% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Small Cap Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 31.53%

Worst Quarter:
12/31/08 -27.07%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard International Small Cap Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	(4.74%)	10.10%	1.35%	6.70%	Dec. 01, 1993
Open Shares	(5.01%)	9.78%	1.07%	6.22%	Feb. 13, 1997
R6 Shares	(4.74%)	10.10%	1.35%	6.70%
After Taxes on Distributions | Institutional Shares	(5.18%)	9.84%	0.51%	5.66%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	(1.94%)	8.22%	1.39%	5.80%
MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Institutional)	2.18%	10.56%	2.95%	5.37%
MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Open)	2.18%	10.56%	2.95%	5.65%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Label

Element

Value

Lazard International Small Cap Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Small Cap Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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)

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 63% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

63.00%

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. 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 Portfolio invests primarily in equity securities, principally common stocks, of relatively small non-US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “small non-US companies” to be those non-US companies with market capitalizations, at the time of initial purchase by the Portfolio, below $5 billion or in the range of companies included in the MSCI EAFE Small Cap Index (based on market capitalization of the Index as a whole, which ranged from approximately $136.9 million to $8.4 billion as of March 30, 2017).

In choosing stocks for the Portfolio, the Investment Manager looks for smaller, well-managed non-US companies that the Investment Manager believes have the potential for growth. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap companies.

The Portfolio may invest up to 25% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 International Small Cap Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 International Small Cap Equity 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.LazardNet.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:
6/30/09 31.53%

Worst Quarter:
12/31/08 -27.07%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

31.53%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(27.07%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 International Small Cap Equity Portfolio | MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.18%

5 Years

rr_AverageAnnualReturnYear05

10.56%

10 Years

rr_AverageAnnualReturnYear10

2.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.37%

Lazard International Small Cap Equity Portfolio | MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.18%

5 Years

rr_AverageAnnualReturnYear05

10.56%

10 Years

rr_AverageAnnualReturnYear10

2.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.65%

Lazard International Small Cap Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.06%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

337

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

585

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,294

Annual Return 2007

rr_AnnualReturn2007

(4.61%)

Annual Return 2008

rr_AnnualReturn2008

(49.84%)

Annual Return 2009

rr_AnnualReturn2009

39.17%

Annual Return 2010

rr_AnnualReturn2010

23.55%

Annual Return 2011

rr_AnnualReturn2011

(14.11%)

Annual Return 2012

rr_AnnualReturn2012

22.28%

Annual Return 2013

rr_AnnualReturn2013

30.20%

Annual Return 2014

rr_AnnualReturn2014

(2.77%)

Annual Return 2015

rr_AnnualReturn2015

9.71%

Annual Return 2016

rr_AnnualReturn2016

(4.74%)

1 Year

rr_AverageAnnualReturnYear01

(4.74%)

5 Years

rr_AverageAnnualReturnYear05

10.10%

10 Years

rr_AverageAnnualReturnYear10

1.35%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.70%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 01, 1993

Lazard International Small Cap Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(5.18%)

5 Years

rr_AverageAnnualReturnYear05

9.84%

10 Years

rr_AverageAnnualReturnYear10

0.51%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.66%

Lazard International Small Cap Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(1.94%)

5 Years

rr_AverageAnnualReturnYear05

8.22%

10 Years

rr_AverageAnnualReturnYear10

1.39%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.80%

Lazard International Small Cap Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.30%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.30%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

412

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

713

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,568

1 Year

rr_AverageAnnualReturnYear01

(5.01%)

5 Years

rr_AverageAnnualReturnYear05

9.78%

10 Years

rr_AverageAnnualReturnYear10

1.07%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.22%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 13, 1997

Lazard International Small Cap Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.06%

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

$ 108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

337

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

585

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,294

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

(4.74%)

5 Years

rr_AverageAnnualReturnYear05

10.10%

10 Years

rr_AverageAnnualReturnYear10

1.35%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.70%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard Global Equity Select Portfolio

Lazard Global Equity Select Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Global Equity Select Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.80%	0.80%	0.80%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.95%	4.33%	0.95%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		1.76%	5.39%	1.76%
Fee Waiver and Expense Reimbursement	[2]	0.70%	4.03%	0.75%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	1.06%	1.36%	1.01%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Global Equity Select Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	108	486	889	2,015
Open Shares	138	1,251	2,356	5,079
R6 Shares	103	481	884	2,011

Portfolio Turnover

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 40% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of companies that the Investment Manager believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. In managing the Portfolio, the Investment Manager utilizes a flexible investment approach and engages in bottom-up, fundamental security analysis and selection. The Portfolio may invest in securities across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. In addition, 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 non-US companies. The Investment Manager will allocate the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio’s investments in non-US companies may include companies whose principal business activities are located in emerging market countries.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
12/31/15 5.14%

Worst Quarter:
9/30/15 -6.63%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Global Equity Select Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	2.66%	2.31%	Dec. 31, 2013
Open Shares	2.35%	2.03%	Dec. 31, 2013
R6 Shares	2.66%	2.31%
After Taxes on Distributions | Institutional Shares	2.48%	2.17%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	1.64%	1.76%
MSCI All Country World Index (reflects no deduction for fees, expenses or taxes)	7.86%	3.13%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.05%, 1.35% and 1.00% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard Global Equity Select Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Global Equity Select Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 40% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

40.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of companies that the Investment Manager believes have strong and/or improving financial productivity and are undervalued based on their earnings, cash flow or asset values. In managing the Portfolio, the Investment Manager utilizes a flexible investment approach and engages in bottom-up, fundamental security analysis and selection. The Portfolio may invest in securities across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. In addition, 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 non-US companies. The Investment Manager will allocate the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio’s investments in non-US companies may include companies whose principal business activities are located in emerging market countries.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 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.LazardNet.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:
12/31/15 5.14%

Worst Quarter:
9/30/15 -6.63%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.14%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(6.63%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Equity Select Portfolio | MSCI All Country World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.86%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.13%

Lazard Global Equity Select 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

0.95%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.76%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.70%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.06%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

486

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

889

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,015

Annual Return 2014

rr_AnnualReturn2014

3.84%

Annual Return 2015

rr_AnnualReturn2015

0.46%

Annual Return 2016

rr_AnnualReturn2016

2.66%

1 Year

rr_AverageAnnualReturnYear01

2.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.31%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2013

Lazard Global Equity Select Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.48%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.17%

Lazard Global Equity Select Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.64%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.76%

Lazard Global Equity Select 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

4.33%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

5.39%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

4.03%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.36%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 138

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,251

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

2,356

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 5,079

1 Year

rr_AverageAnnualReturnYear01

2.35%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.03%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2013

Lazard Global Equity Select 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

0.95%

^[3]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.76%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.75%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.01%

^[2]

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

$ 103

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

481

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

884

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,011

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

2.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.31%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.05%, 1.35% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.05%, 1.35% and 1.00% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard Managed Equity Volatility Portfolio

Lazard Managed Equity Volatility Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Managed Equity Volatility Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.60%	0.60%	0.60%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		9.82%	16.42%	9.82%	[1]
Total Annual Portfolio Operating Expenses		10.42%	17.27%	10.42%
Fee Waiver and Expense Reimbursement	[2]	9.67%	16.22%	9.72%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.75%	1.05%	0.70%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Managed Equity Volatility Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	77	2,133	3,973	7,767
Open Shares	107	3,270	5,705	9,613
R6 Shares	72	2,129	3,969	7,765

Portfolio Turnover

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 91% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US and non-US companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. A principal component of the Investment Manager’s investment process for the Portfolio is volatility management. Volatility, a risk measurement, measures the magnitude of fluctuations in the value of a financial instrument or index over time. The Investment Manager seeks to generate attractive risk-adjusted returns while lowering portfolio volatility by using a benchmark-unaware stock selection strategy driven by fundamental inputs that is intended to identify high quality companies with sustainable operating performance. The Investment Manager performs an independent assessment of stock risk and also seeks to manage risk through diversification.

The Portfolio management team selects investments for the Portfolio from a broad investment universe of stocks and depositary receipts, including ADRs, GDRs and EDRs, REITs, warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Portfolio will typically focus on securities of developed market companies, using an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics and create a low volatility portfolio. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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.

Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Managed Equity Volatility Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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.

Best Quarter:
12/31/15 5.37%

Worst Quarter:
9/30/15 -5.99%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Managed Equity Volatility Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	6.45%	2.41%	May 29, 2015
Open Shares	6.14%	2.11%	May 29, 2015
R6 Shares	6.45%	2.41%
After Taxes on Distributions | Institutional Shares	5.90%	1.78%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	4.10%	1.78%
MSCI World Index (reflects no deduction for fees, expenses or taxes)	7.51%	0.90%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed .75%, 1.05% and .70% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Managed Equity Volatility Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Managed Equity Volatility Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 91% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

91.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of US and non-US companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. A principal component of the Investment Manager’s investment process for the Portfolio is volatility management. Volatility, a risk measurement, measures the magnitude of fluctuations in the value of a financial instrument or index over time. The Investment Manager seeks to generate attractive risk-adjusted returns while lowering portfolio volatility by using a benchmark-unaware stock selection strategy driven by fundamental inputs that is intended to identify high quality companies with sustainable operating performance. The Investment Manager performs an independent assessment of stock risk and also seeks to manage risk through diversification.

The Portfolio management team selects investments for the Portfolio from a broad investment universe of stocks and depositary receipts, including ADRs, GDRs and EDRs, REITs, warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Portfolio will typically focus on securities of developed market companies, using an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics and create a low volatility portfolio. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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 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 Managed Equity Volatility Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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 Managed Equity Volatility Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation 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.LazardNet.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:
12/31/15 5.37%

Worst Quarter:
9/30/15 -5.99%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.37%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.99%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Managed Equity Volatility Portfolio | MSCI World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.51%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.90%

Lazard Managed Equity Volatility Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.60%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

9.82%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

10.42%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

9.67%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.75%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,133

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

3,973

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 7,767

Annual Return 2016

rr_AnnualReturn2016

6.45%

1 Year

rr_AverageAnnualReturnYear01

6.45%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.41%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 29, 2015

Lazard Managed Equity Volatility Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.90%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.78%

Lazard Managed Equity Volatility Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.10%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.78%

Lazard Managed Equity Volatility Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.60%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

16.42%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

17.27%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

16.22%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

3,270

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

5,705

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 9,613

1 Year

rr_AverageAnnualReturnYear01

6.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.11%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 29, 2015

Lazard Managed Equity Volatility Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.60%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

9.82%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

10.42%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

9.72%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.70%

^[1]

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

$ 72

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,129

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

3,969

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 7,765

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

6.45%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.41%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed .75%, 1.05% and .70% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Global Strategic Equity Portfolio

Lazard Global Strategic Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Global Strategic Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.85%	0.85%	0.85%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		1.18%	12.21%	1.18%	[1]
Total Annual Portfolio Operating Expenses		2.03%	13.31%	2.03%
Fee Waiver and Expense Reimbursement	[2]	0.93%	11.91%	0.98%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.10%	1.40%	1.05%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Global Strategic Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	112	547	1,007	2,284
Open Shares	143	2,676	4,806	8,762
R6 Shares	107	542	1,003	2,280

Portfolio Turnover

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 67% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager seeks to realize the Portfolio’s investment objective primarily through stock selection, investing in companies believed to have sustainably high or improving returns and trading at attractive valuations. The Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries, and the allocation of the Portfolio’s assets to emerging market countries may vary from time to time. The Portfolio may invest in securities of companies across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. In addition, 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 non-US companies. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The allocation of the Portfolio’s assets among geographic sectors may shift from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio generally invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Strategic Equity 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
12/31/15 4.23%

Worst Quarter:
9/30/15 -5.65%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Global Strategic Equity Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	(0.15%)	(1.01%)	Aug. 29, 2014
Open Shares	(0.45%)	(1.31%)	Aug. 29, 2014
R6 Shares	(0.15%)	(1.01%)
After Taxes on Distributions | Institutional Shares	(0.31%)	(1.14%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	0.05%	(0.72%)
MSCI All Country World Index (reflects no deduction for fees, expenses or taxes)	7.86%	0.99%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares for the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Global Strategic Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Global Strategic Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 67% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

67.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager seeks to realize the Portfolio’s investment objective primarily through stock selection, investing in companies believed to have sustainably high or improving returns and trading at attractive valuations. The Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries, and the allocation of the Portfolio’s assets to emerging market countries may vary from time to time. The Portfolio may invest in securities of companies across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities. In addition, 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 non-US companies. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The allocation of the Portfolio’s assets among geographic sectors may shift from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Value Investing Risk. The Portfolio generally invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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 Strategic Equity 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Strategic Equity 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.LazardNet.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:
12/31/15 4.23%

Worst Quarter:
9/30/15 -5.65%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2015

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

4.23%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.65%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Strategic Equity Portfolio | MSCI All Country World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.86%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.99%

Lazard Global Strategic Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.18%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.03%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.93%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.10%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

547

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,007

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,284

Annual Return 2015

rr_AnnualReturn2015

(1.85%)

Annual Return 2016

rr_AnnualReturn2016

(0.15%)

1 Year

rr_AverageAnnualReturnYear01

(0.15%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.01%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 29, 2014

Lazard Global Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

(0.31%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.14%)

Lazard Global Strategic Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

0.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.72%)

Lazard Global Strategic Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

12.21%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

13.31%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

11.91%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.40%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 143

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,676

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

4,806

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 8,762

1 Year

rr_AverageAnnualReturnYear01

(0.45%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.31%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Aug. 29, 2014

Lazard Global Strategic Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.18%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.03%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.98%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

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 for the last fiscal year.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

542

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,003

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,280

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

(0.15%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.01%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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 for the last fiscal year.

XML

Lazard Emerging Markets Equity Portfolio

Lazard Emerging Markets Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.09%	0.10%	0.10%
Total Annual Portfolio Operating Expenses		1.09%	1.35%	1.10%
Fee Waiver and Expense Reimbursement	[1]			0.01%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement		1.09%	1.35%	1.09%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	111	347	601	1,329
Open Shares	137	428	739	1,624
R6 Shares	111	349	605	1,339

Portfolio Turnover

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 12% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries and that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Russia, South Africa, Taiwan, Thailand, Turkey and United Arab Emirates.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 34.12%

Worst Quarter:
12/31/08 -30.50%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

Average Annual Returns - Lazard Emerging Markets Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	20.52%	2.28%	2.90%	6.55%	Jul. 15, 1994
Open Shares	20.17%	2.00%	2.59%	6.26%	Jan. 08, 1997
R6 Shares	20.52%			(2.16%)	Jan. 19, 2015
After Taxes on Distributions | Institutional Shares	20.40%	1.90%	2.07%	5.73%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	12.26%	2.18%	2.61%	5.57%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Institutional)	11.19%	1.28%	1.84%	4.86%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Open)	11.19%	1.28%	1.84%	5.38%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (R6)	11.19%	1.28%	1.84%	(2.87%)

[1] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), the Investment Manager has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.

XML

Label

Element

Value

Lazard Emerging Markets Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. 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, 2018

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 12% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

12.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries and that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Russia, South Africa, Taiwan, Thailand, Turkey and United Arab Emirates.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 Emerging Markets Equity 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 Institutional Shares has varied from year to year over the past 10 calendar years. Updated performance information is available at www.LazardNet.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 Emerging Markets Equity 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.LazardNet.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:
6/30/09 34.12%

Worst Quarter:
12/31/08 -30.50%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

34.12%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(30.50%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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.

Lazard Emerging Markets Equity Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

10 Years

rr_AverageAnnualReturnYear10

1.84%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.86%

Lazard Emerging Markets Equity Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

10 Years

rr_AverageAnnualReturnYear10

1.84%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.38%

Lazard Emerging Markets Equity Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

10 Years

rr_AverageAnnualReturnYear10

1.84%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.87%)

Lazard Emerging Markets Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.09%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.09%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.09%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 111

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

347

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

601

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,329

Annual Return 2007

rr_AnnualReturn2007

33.05%

Annual Return 2008

rr_AnnualReturn2008

(47.88%)

Annual Return 2009

rr_AnnualReturn2009

69.82%

Annual Return 2010

rr_AnnualReturn2010

22.81%

Annual Return 2011

rr_AnnualReturn2011

(17.75%)

Annual Return 2012

rr_AnnualReturn2012

22.36%

Annual Return 2013

rr_AnnualReturn2013

(0.80%)

Annual Return 2014

rr_AnnualReturn2014

(4.16%)

Annual Return 2015

rr_AnnualReturn2015

(20.16%)

Annual Return 2016

rr_AnnualReturn2016

20.52%

1 Year

rr_AverageAnnualReturnYear01

20.52%

5 Years

rr_AverageAnnualReturnYear05

2.28%

10 Years

rr_AverageAnnualReturnYear10

2.90%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.55%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 15, 1994

Lazard Emerging Markets Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

20.40%

5 Years

rr_AverageAnnualReturnYear05

1.90%

10 Years

rr_AverageAnnualReturnYear10

2.07%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.73%

Lazard Emerging Markets Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

12.26%

5 Years

rr_AverageAnnualReturnYear05

2.18%

10 Years

rr_AverageAnnualReturnYear10

2.61%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.57%

Lazard Emerging Markets Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.10%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.35%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.35%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 137

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

428

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

739

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,624

1 Year

rr_AverageAnnualReturnYear01

20.17%

5 Years

rr_AverageAnnualReturnYear05

2.00%

10 Years

rr_AverageAnnualReturnYear10

2.59%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.26%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 08, 1997

Lazard Emerging Markets Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.10%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.10%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.09%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 111

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

349

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

605

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,339

1 Year

rr_AverageAnnualReturnYear01

20.52%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.16%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 19, 2015

[1] To the extent the Total Annual Portfolio Operating Expenses of the R6 Shares of the Portfolio exceed the Total Annual Portfolio Operating Expenses of the Portfolio's Institutional Shares (in each case, not including management fees, custodial fees or other expenses related to the management of the Portfolio's assets), the Investment Manager has contractually agreed, until May 1, 2018, to bear the expenses of the R6 Shares in the amount of such excess. This agreement will terminate automatically in the event of termination of the Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.

XML

Lazard Emerging Markets Core Equity Portfolio

Lazard Emerging Markets Core Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Core Equity Portfolio		Institutional Shares	Open Shares	R6
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.31%	0.89%	0.31%	[1]
Total Annual Portfolio Operating Expenses		1.31%	2.14%	1.31%
Fee Waiver and Expense Reimbursement	[2]	0.01%	0.54%	0.06%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.30%	1.60%	1.25%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Core Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	132	414	717	1,578
Open Shares	163	618	1,100	2,430
R6	127	409	712	1,574

Portfolio Turnover

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 62% of the average value of its portfolio.

Principal Investment Strategies

In managing the Portfolio, the Investment Manager utilizes a flexible, core investment approach and engages in bottom-up, fundamental security analysis and selection. The Investment Manager may consider a security’s growth or value potential in managing the Portfolio. The Portfolio may invest in securities across the capitalization spectrum, although it typically invests in securities of companies with a market capitalization of $300 million or more.

The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions. Emerging market countries include all countries not represented by the MSCI World Index. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies that are economically tied to emerging market countries.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Small Cap Companies Risk. Small 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 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Growth Investing Risk. The Portfolio invests in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Core Equity 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/16 7.64%

Worst Quarter:
9/30/15 -15.43%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Emerging Markets Core Equity Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	3.47%	(3.26%)	Oct. 31, 2013
Open Shares	3.17%	(3.60%)	Oct. 31, 2013
R6	3.47%	(3.26%)
After Taxes on Distributions | Institutional Shares	3.47%	(3.28%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	2.30%	(2.35%)
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	11.19%	(3.32%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Emerging Markets Core Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Core Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 62% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

62.00%

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 fee waiver and expense reimbursement arrangement 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

In managing the Portfolio, the Investment Manager utilizes a flexible, core investment approach and engages in bottom-up, fundamental security analysis and selection. The Investment Manager may consider a security’s growth or value potential in managing the Portfolio. The Portfolio may invest in securities across the capitalization spectrum, although it typically invests in securities of companies with a market capitalization of $300 million or more.

The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions. Emerging market countries include all countries not represented by the MSCI World Index. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies that are economically tied to emerging market countries.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Small Cap Companies Risk. Small 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 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Growth Investing Risk. The Portfolio invests in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 Emerging Markets Core Equity 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Emerging Markets Core Equity 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.LazardNet.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:
9/30/16 7.64%

Worst Quarter:
9/30/15 -15.43%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(15.43%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Emerging Markets Core Equity Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.32%)

Lazard Emerging Markets Core Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.31%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

414

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

717

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,578

Annual Return 2014

rr_AnnualReturn2014

(1.25%)

Annual Return 2015

rr_AnnualReturn2015

(10.36%)

Annual Return 2016

rr_AnnualReturn2016

3.47%

1 Year

rr_AverageAnnualReturnYear01

3.47%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.26%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2013

Lazard Emerging Markets Core Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.47%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.28%)

Lazard Emerging Markets Core Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.30%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.35%)

Lazard Emerging Markets Core Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.89%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.14%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.54%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

618

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,100

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,430

1 Year

rr_AverageAnnualReturnYear01

3.17%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.60%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2013

Lazard Emerging Markets Core Equity Portfolio | R6

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.31%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.06%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.25%

^[1]

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

$ 127

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

409

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

712

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

3.47%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.26%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Emerging Markets Equity Advantage Portfolio

Lazard Emerging Markets Equity Advantage Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Equity Advantage Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.85%	0.85%	0.85%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		8.72%	18.92%	8.72%	[1]
Total Annual Portfolio Operating Expenses		9.57%	20.02%	9.57%
Fee Waiver and Expense Reimbursement	[2]	8.47%	18.62%	8.52%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.10%	1.40%	1.05%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Equity Advantage Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	112	2,011	3,740	7,417
Open Shares	143	3,691	6,254	9,962
R6 Shares	107	2,366	4,019	7,535

Portfolio Turnover

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 57% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of emerging markets companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. The Portfolio management team selects investments for the Portfolio from a broad investment universe of emerging market stocks and depositary receipts, including ADRs, GDRs and EDRs, REITs, warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Investment Manager uses an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies that are economically tied to emerging market countries. The allocation of the Portfolio’s assets among countries and regions will vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. 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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and 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.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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.

Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/16 8.55%

Worst Quarter:
9/30/15 -15.35%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Emerging Markets Equity Advantage Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	9.83%	(6.33%)	May 29, 2015
Open Shares	9.51%	(6.62%)	May 29, 2015
R6 Shares	9.83%	(6.33%)
After Taxes on Distributions | Institutional Shares	9.69%	(6.62%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	6.19%	(4.64%)
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	11.19%	(6.76%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Emerging Markets Equity Advantage Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Equity Advantage Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 57% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

57.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio invests primarily in equity securities, principally common stocks, of emerging markets companies. In managing the Portfolio, the Investment Manager utilizes a quantitatively driven, bottom up stock selection process. The Portfolio management team selects investments for the Portfolio from a broad investment universe of emerging market stocks and depositary receipts, including ADRs, GDRs and EDRs, REITs, warrants and rights. The active, quantitative approach utilized by the Portfolio management team involves initial screening, risk assessment and evaluation of each company relative to its global peers. The Investment Manager uses an objective, systematic investment process that blends both risk and stock ranking assessments designed to capture attractive risk-to-return characteristics. In addition to a multidimensional assessment of risk, each company is evaluated daily according to four independent measures: growth, value, sentiment and quality. The Portfolio may invest across the capitalization spectrum.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies that are economically tied to emerging market countries. The allocation of the Portfolio’s assets among countries and regions will vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. 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.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends largely upon the effectiveness of the Investment Manager’s quantitative model. 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

REIT Risk. REITS are subject to similar risks as an investment in a realty-related company. The risks related to investments in realty-related companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of other stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and 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.

Other Equity Securities Risk. Investments in rights and warrants involve certain risks including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the right or warrant may expire without being exercised and result in a loss of a Portfolio’s entire investment.

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 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 Emerging Markets Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. Updated performance information is available at www.LazardNet.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 Emerging Markets Equity Advantage Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation 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.LazardNet.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:
9/30/16 8.55%

Worst Quarter:
9/30/15 -15.35%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

8.55%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(15.35%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Emerging Markets Equity Advantage Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(6.76%)

Lazard Emerging Markets Equity Advantage Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

8.72%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

9.57%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

8.47%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.10%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,011

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

3,740

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 7,417

Annual Return 2016

rr_AnnualReturn2016

(9.83%)

1 Year

rr_AverageAnnualReturnYear01

9.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(6.33%)

Inception Date

rr_AverageAnnualReturnInceptionDate

May 29, 2015

Lazard Emerging Markets Equity Advantage Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.69%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(6.62%)

Lazard Emerging Markets Equity Advantage Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.64%)

Lazard Emerging Markets Equity Advantage Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

18.92%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

20.02%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

18.62%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.40%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 143

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

3,691

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

6,254

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 9,962

1 Year

rr_AverageAnnualReturnYear01

9.51%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(6.62%)

Inception Date

rr_AverageAnnualReturnInceptionDate

May 29, 2015

Lazard Emerging Markets Equity Advantage Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

8.72%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

9.57%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

8.52%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

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

$ 107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,366

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

4,019

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 7,535

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

9.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(6.33%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Developing Markets Equity Portfolio

Lazard Developing Markets Equity Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Developing Markets Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.23%	0.40%	0.23%	[1]
Total Annual Portfolio Operating Expenses		1.23%	1.65%	1.23%
Fee Waiver and Expense Reimbursement	[2]		0.05%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.23%	1.60%	1.23%

Example

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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Developing Markets Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	125	390	676	1,489
Open Shares	163	515	892	1,950
R6 Shares	125	390	676	1,489

Portfolio Turnover

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 56% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries (also known as “developing markets”).

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Russia, South Africa, Taiwan, Thailand, Turkey and United Arab Emirates.

The Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Growth Investing Risk. The Portfolio invests in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Developing Markets Equity 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 Institutional Shares varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 56.64%

Worst Quarter:
12/31/08 -34.54%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Developing Markets Equity Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	14.81%	0.22%	3.33%	Sep. 30, 2008
Open Shares	14.31%	(0.12%)	3.01%	Sep. 30, 2008
R6 Shares	14.81%	0.22%	3.33%
After Taxes on Distributions | Institutional Shares	14.76%	0.14%	2.59%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	8.80%	0.33%	2.64%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	11.19%	1.28%	3.57%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Developing Markets Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Developing Markets Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 56% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

56.00%

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. 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 Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries (also known as “developing markets”).

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Greece, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Peru, Philippines, Poland, Qatar, Russia, South Africa, Taiwan, Thailand, Turkey and United Arab Emirates.

The Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Growth Investing Risk. The Portfolio invests in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 Developing Markets Equity 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 Institutional Shares varied from year to year. Updated performance information is available at www.LazardNet.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 Developing Markets Equity 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.LazardNet.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:
6/30/09 56.64%

Worst Quarter:
12/31/08 -34.54%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

56.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(34.54%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Developing Markets Equity Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.57%

Lazard Developing Markets Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.23%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.23%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 125

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

390

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

676

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,489

Annual Return 2009

rr_AnnualReturn2009

108.53%

Annual Return 2010

rr_AnnualReturn2010

28.62%

Annual Return 2011

rr_AnnualReturn2011

(26.15%)

Annual Return 2012

rr_AnnualReturn2012

17.16%

Annual Return 2013

rr_AnnualReturn2013

(3.90%)

Annual Return 2014

rr_AnnualReturn2014

(10.27%)

Annual Return 2015

rr_AnnualReturn2015

(12.84%)

Annual Return 2016

rr_AnnualReturn2016

14.81%

1 Year

rr_AverageAnnualReturnYear01

14.81%

5 Years

rr_AverageAnnualReturnYear05

0.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.33%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2008

Lazard Developing Markets Equity Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.76%

5 Years

rr_AverageAnnualReturnYear05

0.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.59%

Lazard Developing Markets Equity Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.80%

5 Years

rr_AverageAnnualReturnYear05

0.33%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.64%

Lazard Developing Markets Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.65%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.05%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

515

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

892

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,950

1 Year

rr_AverageAnnualReturnYear01

14.31%

5 Years

rr_AverageAnnualReturnYear05

(0.12%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2008

Lazard Developing Markets Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.23%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.23%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.23%

^[1]

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

$ 125

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

390

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

676

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,489

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

14.81%

5 Years

rr_AverageAnnualReturnYear05

0.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.33%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Emerging Markets Equity Blend Portfolio

Lazard Emerging Markets Equity Blend Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Equity Blend Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.26%	0.65%	0.26%	[1]
Total Annual Portfolio Operating Expenses		1.26%	1.90%	1.26%
Fee Waiver and Expense Reimbursement	[2]		0.30%	0.01%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.26%	1.60%	1.25%

Example

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 fee waiver and expense reimbursement arrangement in one year only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Equity Blend Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	128	400	692	1,523
Open Shares	163	566	994	2,188
R6 Shares	127	399	691	1,522

Portfolio Turnover

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 47% of the average value of its portfolio.

Principal Investment Strategies

The Investment Manager allocates the Portfolio’s assets among various emerging markets equity strategies managed by the Investment Manager (and other emerging markets equity securities held in other strategies managed by the Investment Manager) in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time without notice to shareholders, and at any given time the allocation to one strategy, region or country may comprise a substantial percentage of the Portfolio’s assets, or conversely, there may be no allocation to any such strategy, region or country. The Investment Manager will make allocation and securities selection decisions based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios. The Investment Manager may consider a security’s value or growth characteristics in selecting investments for the Portfolio and may invest in securities of any size or market capitalization.

The equity securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing and Growth Investing Risks. The Portfolio invests a portion of its assets in stocks 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 stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends upon effectiveness of the Investment Manager’s quantitative model. 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 between the investment strategies. The Investment Manager’s evaluations and assumptions underlying its allocation decisions may differ from actual market conditions.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Equity Blend 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/10 17.62%

Worst Quarter:
9/30/11 –24.35%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Emerging Markets Equity Blend Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	13.12%	1.05%	0.67%	May 28, 2010
Open Shares	12.74%	0.80%	0.40%	May 28, 2010
R6 Shares	13.12%	1.05%	0.67%
After Taxes on Distributions | Institutional Shares	13.25%	0.93%	0.54%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	7.81%	1.02%	0.69%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	11.19%	1.28%	1.36%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Emerging Markets Equity Blend Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Equity Blend Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. 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, 2018

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 47% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

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 fee waiver and expense reimbursement arrangement in one year 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 emerging markets equity strategies managed by the Investment Manager (and other emerging markets equity securities held in other strategies managed by the Investment Manager) in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time without notice to shareholders, and at any given time the allocation to one strategy, region or country may comprise a substantial percentage of the Portfolio’s assets, or conversely, there may be no allocation to any such strategy, region or country. The Investment Manager will make allocation and securities selection decisions based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios. The Investment Manager may consider a security’s value or growth characteristics in selecting investments for the Portfolio and may invest in securities of any size or market capitalization.

The equity securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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.

Value Investing and Growth Investing Risks. The Portfolio invests a portion of its assets in stocks 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 stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio’s investment strategy depends upon effectiveness of the Investment Manager’s quantitative model. 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 between the investment strategies. The Investment Manager’s evaluations and assumptions underlying its allocation decisions may differ from actual market conditions.

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 Emerging Markets Equity Blend 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Emerging Markets Equity Blend 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.LazardNet.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:
9/30/10 17.62%

Worst Quarter:
9/30/11 –24.35%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

17.62%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(24.35%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Emerging Markets Equity Blend Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.36%

Lazard Emerging Markets Equity Blend Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.26%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.26%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.26%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 128

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

400

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

692

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,523

Annual Return 2011

rr_AnnualReturn2011

(20.43%)

Annual Return 2012

rr_AnnualReturn2012

18.19%

Annual Return 2013

rr_AnnualReturn2013

(1.14%)

Annual Return 2014

rr_AnnualReturn2014

(8.66%)

Annual Return 2015

rr_AnnualReturn2015

(12.74%)

Annual Return 2016

rr_AnnualReturn2016

13.12%

1 Year

rr_AverageAnnualReturnYear01

13.12%

5 Years

rr_AverageAnnualReturnYear05

1.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.67%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 28, 2010

Lazard Emerging Markets Equity Blend Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.25%

5 Years

rr_AverageAnnualReturnYear05

0.93%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.54%

Lazard Emerging Markets Equity Blend Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.81%

5 Years

rr_AverageAnnualReturnYear05

1.02%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.69%

Lazard Emerging Markets Equity Blend Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.65%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.90%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.30%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

566

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

994

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,188

1 Year

rr_AverageAnnualReturnYear01

12.74%

5 Years

rr_AverageAnnualReturnYear05

0.80%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 28, 2010

Lazard Emerging Markets Equity Blend Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.26%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.26%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.25%

^[1]

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

$ 127

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

399

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

691

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,522

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

13.12%

5 Years

rr_AverageAnnualReturnYear05

1.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.67%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Emerging Markets Multi-Asset Portfolio

Lazard Emerging Markets Multi-Asset Portfolio

Investment Objective

The Portfolio seeks total return from current income and capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Multi-Asset Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.31%	1.69%	0.31%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		1.32%	2.95%	1.32%
Fee Waiver and Expense Reimbursement	[2]	0.01%	1.34%	0.06%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	1.31%	1.61%	1.26%

Example

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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Multi-Asset Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	133	415	718	1,579
Open Shares	164	508	876	1,911
R6 Shares	128	400	692	1,523

Portfolio Turnover

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 115% of the average value of its portfolio.

Principal Investment Strategies

The Investment Manager allocates the Portfolio’s assets among various emerging markets equity, debt and currency investment strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time without notice to shareholders, and at any given time the allocation to one strategy (other than currency investments) may comprise a substantial percentage of the Portfolio’s assets or, conversely, there may be no allocation to such strategy. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios.

The Portfolio may invest in:

• equity securities, including common stocks and depositary receipts and shares

• debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds (“junk bonds”), convertible securities, commercial paper, collateralized debt obligations (“CDOs”), short- and medium-term obligations and other fixed-income obligations

• emerging markets currencies and related instruments (primarily forward currency contracts) and structured notes

The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer. Under normal circumstances, the Portfolio invests at least 80% of its assets in securities and other investments that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s Investors Service, Inc. (“Moody’s”) or lower than BBB by Standard & Poor’s Ratings Group (“S&P”)) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in debt securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Portfolio’s currency strategy uses forward currency contracts, options on currencies and structured notes, although the Portfolio may not allocate assets to the currency strategy at all times, and there may be no allocation to currency investments for significant periods of time. The Portfolio also may, but is not required to, enter into forward foreign currency contracts, purchase options on currencies and enter into currency swaps to hedge the foreign currency exposure associated with equity or debt investment strategies. The Portfolio also may enter into credit default swaps and other types of swaps, for hedging purposes or to seek to increase returns.

Principal Investment Risks

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 the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Value Investing and Growth Investing Risks. The Portfolio may invest a portion of its assets in stocks 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 may invest a portion of its assets in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio depends upon effectiveness of the Investment Manager’s quantitative model. 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 interest rates in the US and other countries are at or near historic lows.

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 in an investment offering a lower yield (and the Portfolio may not 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.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities 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. Forward currency contracts, over-the-counter options on currencies, structured notes, swap agreements 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 currency, interest rate, security or other reference asset. 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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Multi-Asset 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
3/31/12 12.14%

Worst Quarter:
9/30/11 -14.99%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Emerging Markets Multi-Asset Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	8.91%	0.21%	(2.37%)	Mar. 31, 2011
Open Shares	8.58%	(0.18%)	(2.67%)	Mar. 31, 2011
R6 Shares	8.91%	0.21%	(2.37%)
After Taxes on Distributions | Institutional Shares	8.80%	(0.02%)	(2.58%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	5.38%	0.25%	(1.70%)
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	11.19%	1.28%	(2.75%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.30%, 1.60% and 1.25% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

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Lazard Emerging Markets Multi-Asset Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard Emerging Markets Multi-Asset Portfolio

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The Portfolio seeks total return from current income and capital appreciation.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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]

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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

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May 01, 2027

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 115% of the average value of its portfolio.

Portfolio Turnover, Rate

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115.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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The Investment Manager allocates the Portfolio’s assets among various emerging markets equity, debt and currency investment strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time without notice to shareholders, and at any given time the allocation to one strategy (other than currency investments) may comprise a substantial percentage of the Portfolio’s assets or, conversely, there may be no allocation to such strategy. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios.

The Portfolio may invest in:

• equity securities, including common stocks and depositary receipts and shares

• debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds (“junk bonds”), convertible securities, commercial paper, collateralized debt obligations (“CDOs”), short- and medium-term obligations and other fixed-income obligations

• emerging markets currencies and related instruments (primarily forward currency contracts) and structured notes

The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer. Under normal circumstances, the Portfolio invests at least 80% of its assets in securities and other investments that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s Investors Service, Inc. (“Moody’s”) or lower than BBB by Standard & Poor’s Ratings Group (“S&P”)) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in debt securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Portfolio’s currency strategy uses forward currency contracts, options on currencies and structured notes, although the Portfolio may not allocate assets to the currency strategy at all times, and there may be no allocation to currency investments for significant periods of time. The Portfolio also may, but is not required to, enter into forward foreign currency contracts, purchase options on currencies and enter into currency swaps to hedge the foreign currency exposure associated with equity or debt investment strategies. The Portfolio also may enter into credit default swaps and other types of swaps, for hedging purposes or to seek to increase returns.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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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 the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Value Investing and Growth Investing Risks. The Portfolio may invest a portion of its assets in stocks 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 may invest a portion of its assets in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio depends upon effectiveness of the Investment Manager’s quantitative model. 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 interest rates in the US and other countries are at or near historic lows.

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 in an investment offering a lower yield (and the Portfolio may not 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.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities 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. Forward currency contracts, over-the-counter options on currencies, structured notes, swap agreements 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 currency, interest rate, security or other reference asset. 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]

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

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Multi-Asset 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Emerging Markets Multi-Asset 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]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
3/31/12 12.14%

Worst Quarter:
9/30/11 -14.99%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Mar. 31, 2012

Highest Quarterly Return

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12.14%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Sep. 30, 2011

Lowest Quarterly Return

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(14.99%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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]

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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, 2016) 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 Emerging Markets Multi-Asset Portfolio | MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.19%

5 Years

rr_AverageAnnualReturnYear05

1.28%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.75%)

Lazard Emerging Markets Multi-Asset Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.32%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.31%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 133

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

415

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

718

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,579

Annual Return 2012

rr_AnnualReturn2012

14.02%

Annual Return 2013

rr_AnnualReturn2013

(2.41%)

Annual Return 2014

rr_AnnualReturn2014

(5.57%)

Annual Return 2015

rr_AnnualReturn2015

(11.69%)

Annual Return 2016

rr_AnnualReturn2016

8.91%

1 Year

rr_AverageAnnualReturnYear01

8.91%

5 Years

rr_AverageAnnualReturnYear05

0.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.37%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2011

Lazard Emerging Markets Multi-Asset Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.80%

5 Years

rr_AverageAnnualReturnYear05

(0.02%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.58%)

Lazard Emerging Markets Multi-Asset Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.38%

5 Years

rr_AverageAnnualReturnYear05

0.25%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.70%)

Lazard Emerging Markets Multi-Asset Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

1.69%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.95%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.34%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.61%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 164

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

508

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

876

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,911

1 Year

rr_AverageAnnualReturnYear01

8.58%

5 Years

rr_AverageAnnualReturnYear05

(0.18%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.67%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2011

Lazard Emerging Markets Multi-Asset Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.31%

^[3]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.32%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.06%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.26%

^[2]

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

$ 128

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

400

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

692

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,523

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

8.91%

5 Years

rr_AverageAnnualReturnYear05

0.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.37%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.30%, 1.60% and 1.25% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard Emerging Markets Debt Portfolio

Lazard Emerging Markets Debt Portfolio

Investment Objective

The Portfolio seeks total return from current income and capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Debt Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.21%	0.40%	1.46%
Total Annual Portfolio Operating Expenses		0.96%	1.40%	2.21%
Fee Waiver and Expense Reimbursement	[1]	0.01%	0.20%	1.31%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.95%	1.20%	0.90%

Example

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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Debt Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	97	305	530	1,177
Open Shares	122	423	747	1,662
R6 Shares	92	319	565	1,269

Portfolio Turnover

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 118% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds, convertible securities, commercial paper, CDOs, short- and medium-term obligations and other fixed-income obligations, and may invest in money market instruments such as certificates of deposit. The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer.

Under normal circumstances, the Portfolio invests at least 80% of its assets in debt securities that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The Portfolio currently intends to focus its investments in Asia, Africa, the Middle East, Latin America and the developing countries of Europe, although the allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Portfolio may, but is not required to enter into forward currency contracts and credit default swaps, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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. Forward currency contracts, over-the-counter options on currencies, swap agreements 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 currency, interest rate, security or other reference asset. 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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Debt Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to those 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.LazardNet.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.

Best Quarter:
3/31/12 7.52%

Worst Quarter:
6/30/13 -7.60%

Average Annual Total Returns (for the periods ended December 31, 2016)

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.

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Average Annual Returns - Lazard Emerging Markets Debt Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	8.50%	1.43%	1.50%	Feb. 28, 2011
Open Shares	8.13%	1.15%	1.21%	Feb. 28, 2011
R6 Shares			(3.06%)	Jul. 28, 2016
After Taxes on Distributions | Institutional Shares	7.45%	0.13%	0.14%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	4.81%	0.60%	0.65%
JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	10.15%		6.38%
JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (R6)	10.15%		(1.82%)
JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	9.94%		(1.39%)
JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (R6)	9.94%		(3.21%)
50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)	10.16%		2.50%
50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes) (R6)	10.16%		(2.50%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .95%, 1.20% and .90% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, and from May 1, 2018 through May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard Emerging Markets Debt Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Debt Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return from current income and capital appreciation.

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. 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, 2018

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 118% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

118.00%

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 fee waiver and expense reimbursement arrangement described above. 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 Portfolio invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds, convertible securities, commercial paper, CDOs, short- and medium-term obligations and other fixed-income obligations, and may invest in money market instruments such as certificates of deposit. The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer.

Under normal circumstances, the Portfolio invests at least 80% of its assets in debt securities that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The Portfolio currently intends to focus its investments in Asia, Africa, the Middle East, Latin America and the developing countries of Europe, although the allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Portfolio may, but is not required to enter into forward currency contracts and credit default swaps, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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. Forward currency contracts, over-the-counter options on currencies, swap agreements 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 currency, interest rate, security or other reference asset. 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.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 Emerging Markets Debt Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to those 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.LazardNet.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 Emerging Markets Debt Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to those of broad measures of market performance.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
3/31/12 7.52%

Worst Quarter:
6/30/13 -7.60%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.52%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2013

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(7.60%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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]

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After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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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.

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Lazard Emerging Markets Debt Portfolio | JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.15%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.38%

Lazard Emerging Markets Debt Portfolio | JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.15%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.82%)

Lazard Emerging Markets Debt Portfolio | JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.94%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.39%)

Lazard Emerging Markets Debt Portfolio | JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.94%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.21%)

Lazard Emerging Markets Debt Portfolio | 50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes) (Institutional and Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.50%

Lazard Emerging Markets Debt Portfolio | 50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes) (R6)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(2.50%)

Lazard Emerging Markets Debt Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.96%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.01%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.95%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 97

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

305

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

530

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,177

Annual Return 2012

rr_AnnualReturn2012

18.95%

Annual Return 2013

rr_AnnualReturn2013

(7.13%)

Annual Return 2014

rr_AnnualReturn2014

(2.07%)

Annual Return 2015

rr_AnnualReturn2015

(8.55%)

Annual Return 2016

rr_AnnualReturn2016

8.50%

1 Year

rr_AverageAnnualReturnYear01

8.50%

5 Years

rr_AverageAnnualReturnYear05

1.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.50%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2011

Lazard Emerging Markets Debt Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.45%

5 Years

rr_AverageAnnualReturnYear05

0.13%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.14%

Lazard Emerging Markets Debt Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.81%

5 Years

rr_AverageAnnualReturnYear05

0.60%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.65%

Lazard Emerging Markets Debt Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.40%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.40%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.20%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.20%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

423

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

747

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,662

1 Year

rr_AverageAnnualReturnYear01

8.13%

5 Years

rr_AverageAnnualReturnYear05

1.15%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.21%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2011

Lazard Emerging Markets Debt Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.46%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.21%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.31%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.90%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 92

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

319

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

565

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,269

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.06%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 28, 2016

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .95%, 1.20% and .90% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, and from May 1, 2018 through May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

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Lazard Emerging Markets Income Portfolio

Lazard Emerging Markets Income Portfolio

Investment Objective

The Portfolio seeks total return consisting of appreciation and income.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Emerging Markets Income Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.65%	0.65%	0.65%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		1.60%	11.39%	1.60%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		2.26%	12.30%	2.26%
Fee Waiver and Expense Reimbursement	[2]	1.35%	11.24%	1.40%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	0.91%	1.06%	0.86%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Emerging Markets Income Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	93	576	1,087	2,490
Open Shares	108	2,482	4,522	8,452
R6 Shares	87	571	1,081	2,485

Portfolio Turnover

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 174% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in currencies, debt securities, derivative instruments and other investments that are economically tied to emerging market countries. Such investments may include combinations of these instruments that have economic characteristics similar to currencies or debt securities economically tied to emerging markets countries, such as a currency forward contract denominated in an emerging markets currency and US dollar-denominated debt security in a principal amount corresponding to the notional value of forward contracts, which together have economic characteristics similar to a debt security denominated in the emerging markets currency. Derivatives instruments in which the Portfolio may invest include forward currency contracts (including non-deliverable forward contracts). Debt securities in which the Portfolio may invest include debt securities issued or guaranteed by governments, government agencies or supranational bodies; corporate obligations; fixed and/or adjustable rate or inflation-linked investment grade and non-investment grade bonds (“junk bonds”); convertible securities; zero coupon securities; CDOs; short- and medium-term obligations and other fixed-income obligations; and commercial paper and money market instruments such as certificates of deposit.

Emerging market countries include all countries represented by the JPMorgan Emerging Local Markets Plus Index (ELMI +) or countries outside of the G-10, although the allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the judgment of the Investment Manager and its analysis of market conditions. The securities or instruments in which the Portfolio invests may be denominated in US and non-US currencies, including the local currency of the issuer.

Although the Portfolio is not restricted to investments in securities of any particular maturity or duration, the average duration of the Portfolio is expected to be short, typically less than one year. The Investment Manager may extend duration in particular countries when domestic yield curves are favorable.

The Portfolio is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated.

The Portfolio may, but is not required to, use derivative instruments that are part of its primary investment strategy, such as forward currency contracts, for hedging purposes.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

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.

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. Forward currency contracts and other over-the-counter derivatives transactions are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options and other derivatives transactions 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 currency, security or other reference asset. 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 risk 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.

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 can 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.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent in significant part on counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in the loss of monies owed to the Portfolio by a counterparty.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Adjustable rate or inflation-linked securities provide the Portfolio with a certain degree of protection against rises in interest rates or inflation rates, respectively, although adjustable rate securities will participate in any declines in interest rates and inflation-linked securities can also decline in value based on changes in the relevant periodic adjustment rate. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

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.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 an increase in taxable capital gains distributions to the Portfolio’s shareholders, which will reduce returns to shareholders.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Income 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
3/31/16 5.27%

Worst Quarter:
9/30/15 -6.39%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Emerging Markets Income Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	2.82%	(5.20%)	Apr. 30, 2014
Open Shares	2.52%	(5.48%)	Apr. 30, 2014
R6 Shares	2.82%	(5.20%)
After Taxes on Distributions | Institutional Shares	1.71%	(5.60%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	1.83%	(4.05%)
JP Morgan Emerging Local Markets Index Plus (reflects no deduction for fees, expenses or taxes)	3.54%	(4.57%)

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.05% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .90%, 1.05% and .85% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard Emerging Markets Income Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Income Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return consisting of appreciation and income.

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. Investors transacting in Institutional 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, 2018

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 174% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

174.00%

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 fee waiver and expense reimbursement arrangement 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

Under normal circumstances, the Portfolio invests at least 80% of its assets in currencies, debt securities, derivative instruments and other investments that are economically tied to emerging market countries. Such investments may include combinations of these instruments that have economic characteristics similar to currencies or debt securities economically tied to emerging markets countries, such as a currency forward contract denominated in an emerging markets currency and US dollar-denominated debt security in a principal amount corresponding to the notional value of forward contracts, which together have economic characteristics similar to a debt security denominated in the emerging markets currency. Derivatives instruments in which the Portfolio may invest include forward currency contracts (including non-deliverable forward contracts). Debt securities in which the Portfolio may invest include debt securities issued or guaranteed by governments, government agencies or supranational bodies; corporate obligations; fixed and/or adjustable rate or inflation-linked investment grade and non-investment grade bonds (“junk bonds”); convertible securities; zero coupon securities; CDOs; short- and medium-term obligations and other fixed-income obligations; and commercial paper and money market instruments such as certificates of deposit.

Emerging market countries include all countries represented by the JPMorgan Emerging Local Markets Plus Index (ELMI +) or countries outside of the G-10, although the allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the judgment of the Investment Manager and its analysis of market conditions. The securities or instruments in which the Portfolio invests may be denominated in US and non-US currencies, including the local currency of the issuer.

Although the Portfolio is not restricted to investments in securities of any particular maturity or duration, the average duration of the Portfolio is expected to be short, typically less than one year. The Investment Manager may extend duration in particular countries when domestic yield curves are favorable.

The Portfolio is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated.

The Portfolio may, but is not required to, use derivative instruments that are part of its primary investment strategy, such as forward currency contracts, for hedging purposes.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

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.

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. Forward currency contracts and other over-the-counter derivatives transactions are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options and other derivatives transactions 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 currency, security or other reference asset. 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 risk 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.

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 can 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.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent in significant part on counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in the loss of monies owed to the Portfolio by a counterparty.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Adjustable rate or inflation-linked securities provide the Portfolio with a certain degree of protection against rises in interest rates or inflation rates, respectively, although adjustable rate securities will participate in any declines in interest rates and inflation-linked securities can also decline in value based on changes in the relevant periodic adjustment rate. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

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.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 an increase in taxable capital gains distributions to the Portfolio’s shareholders, which will reduce returns to shareholders.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 Emerging Markets Income 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Emerging Markets Income 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.LazardNet.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:
3/31/16 5.27%

Worst Quarter:
9/30/15 -6.39%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

5.27%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(6.39%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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 Emerging Markets Income Portfolio | JP Morgan Emerging Local Markets Index Plus (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.54%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.57%)

Lazard Emerging Markets Income Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.60%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.26%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.35%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.91%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 93

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

576

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,087

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,490

Annual Return 2015

rr_AnnualReturn2015

(8.04%)

Annual Return 2016

rr_AnnualReturn2016

(2.82%)

1 Year

rr_AverageAnnualReturnYear01

2.82%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.20%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 2014

Lazard Emerging Markets Income Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.71%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.60%)

Lazard Emerging Markets Income Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.05%)

Lazard Emerging Markets Income Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

11.39%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

12.30%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

11.24%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.06%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 108

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

2,482

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

4,522

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 8,452

1 Year

rr_AverageAnnualReturnYear01

2.52%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.48%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Apr. 30, 2014

Lazard Emerging Markets Income Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.65%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.60%

^[3]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.26%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.40%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.86%

^[2]

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

$ 87

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

571

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,081

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,485

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

2.82%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(5.20%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.05% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .90%, 1.05% and .85% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard Explorer Total Return Portfolio

Lazard Explorer Total Return Portfolio

Investment Objective

The Portfolio seeks total return from current income and capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Explorer Total Return Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees	[1]	0.90%	0.90%	0.90%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.17%	1.14%	0.17%	[2]
Acquired Fund Fees and Expenses (Underlying Funds)		0.02%	0.02%	0.02%
Total Annual Portfolio Operating Expenses		1.09%	2.31%	1.09%
Fee Waiver and Expense Reimbursement	[3]		0.89%	0.02%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[4]	1.09%	1.42%	1.07%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Explorer Total Return Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	111	357	623	1,382
Open Shares	145	646	1,175	2,624
R6 Shares	109	355	621	1,380

Portfolio Turnover

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 turnover rate was 173% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies; derivatives; debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations; and other fixed-income obligations. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency.

The Portfolio typically focuses its investments in securities of companies that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. The aggregate notional amount of derivative positions may typically be expected to range from 20% to 100% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. An investment in the Portfolio involves a high degree of risk.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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. Forward currency contracts, swap agreements, over-the-counter options on currencies 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 currency, interest rate, security, interest rate or other reference asset. 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, even if entered into for hedging purposes, transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Explorer Total Return 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.LazardNet.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.

Best Quarter:
6/30/16 3.74%

Worst Quarter:
12/31/14 3.93%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Average Annual Returns - Lazard Explorer Total Return Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	7.23%	0.54%	Jun. 28, 2013
Open Shares	6.83%	0.22%	Jun. 28, 2013
R6 Shares	7.23%	0.54%
After Taxes on Distributions | Institutional Shares	6.23%	(0.83%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	4.08%	(0.21%)
JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes)	10.15%	6.09%
JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes)	9.94%	(4.07%)
50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes)	10.16%	0.96%

[1] Restated to reflect current management fee.

[2] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[3] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[4] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.07%, 1.40% and 1.05% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard Explorer Total Return Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Explorer Total Return Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return from current income and capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 turnover rate was 173% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

173.00%

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current management fee.

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 fee waiver and expense reimbursement arrangement 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 Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies; derivatives; debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations; and other fixed-income obligations. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency.

The Portfolio typically focuses its investments in securities of companies that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.

The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.

The Portfolio may enter into futures contracts on US Treasury securities to seek to hedge the Portfolio’s exposure to the risk of rising interest rates on US Treasury securities embedded in the Portfolio’s emerging market debt securities (to a greater or lesser degree, depending on the currency in which the debt security is denominated). Similarly, the Portfolio also may enter into futures contracts on US Treasury securities in combination with a credit default swap that provides exposure to emerging markets debt securities, baskets of securities or indices.

The Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. The aggregate notional amount of derivative positions may typically be expected to range from 20% to 100% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. An investment in the Portfolio involves a high degree of risk.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

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 interest rates in the US and other countries are at or near historic lows.

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. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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. Forward currency contracts, swap agreements, over-the-counter options on currencies 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 currency, interest rate, security, interest rate or other reference asset. 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, even if entered into for hedging purposes, transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 Explorer Total Return 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.LazardNet.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 Explorer Total Return 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.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:
6/30/16 3.74%

Worst Quarter:
12/31/14 3.93%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

3.74%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2014

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(3.93%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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.

The 50% JPMorgan Emerging Market Bond Index Global Diversified Index/50% JPMorgan Government Bond Index—Emerging Markets Global Diversified Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the JPMorgan Emerging Market Bond Index Global Diversified Index and the JPMorgan Government Bond Index—Emerging Markets Global Diversified Index.

Lazard Explorer Total Return Portfolio | JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.15%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.09%

Lazard Explorer Total Return Portfolio | JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.94%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(4.07%)

Lazard Explorer Total Return Portfolio | 50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.96%

Lazard Explorer Total Return Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.17%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.09%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.09%

^[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 111

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

357

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

623

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,382

Annual Return 2014

rr_AnnualReturn2014

(0.21%)

Annual Return 2015

rr_AnnualReturn2015

(5.13%)

Annual Return 2016

rr_AnnualReturn2016

7.23%

1 Year

rr_AverageAnnualReturnYear01

7.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.54%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2013

Lazard Explorer Total Return Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.83%)

Lazard Explorer Total Return Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.08%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.21%)

Lazard Explorer Total Return Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

1.14%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.31%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.89%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.42%

^[3]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 145

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

646

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,175

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,624

1 Year

rr_AverageAnnualReturnYear01

6.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.22%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jun. 28, 2013

Lazard Explorer Total Return Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.90%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.17%

^[4]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.02%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.09%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.02%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.07%

^[3]

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

$ 109

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

355

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

621

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,380

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

7.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.54%

[1] Restated to reflect current management fee.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.10%, 1.40% and 1.05% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.07%, 1.40% and 1.05% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[4] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard US Realty Equity Portfolio

Lazard US Realty Equity Portfolio

Investment Objectives

The Portfolio’s primary investment objective is long-term capital appreciation,

with current income, including interest and dividends from portfolio securities, as a secondary objective.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard US Realty Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees	[1]	0.75%	0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.32%	0.29%	0.32%	[2]
Total Annual Portfolio Operating Expenses		1.07%	1.29%	1.07%
Fee Waiver and Expense Reimbursement	[3]	0.07%		0.12%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	1.00%	1.29%	0.95%

Example

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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard US Realty Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	102	318	552	1,225
Open Shares	131	409	708	1,556
R6 Shares	97	303	525	1,166

Portfolio Turnover

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 41% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real estate-intensive (i.e. the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio also may invest up to 20% of its assets in equity and fixed-income securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

In addition to purchasing options, the Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Other Equity Securities Risk. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in rights and warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of non-Realty Companies traded on national exchanges, which may affect a Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Small and Mid Cap Companies Risk. Many Realty Companies are small and mid cap companies, which 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 securities 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.

Preferred Securities Risk. There are various risks associated with investing in preferred securities. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, or redeem its issue at par earlier than the scheduled maturity. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

• Certain preferred securities may be substantially less liquid than many other securities, such as common stocks or US Government securities. Illiquid securities involve the risk that the securities will not be able to be sold at the time desired by the Portfolio or at prices approximating the value at which the Portfolio is carrying the securities on its books.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 interest rates in the US and other countries are at or near historic lows.

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.

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. 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and 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 any other investment companies and ETFs in which the Portfolio invests.

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.

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. Forward currency contracts, structured products 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 are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

Performance Bar Chart and Table Year-by-Year Total Returns for Open Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA U.S. Realty Fund (the “Predecessor Realty Equity Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Equity Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/09 36.29%

Worst Quarter:
9/30/11 -17.99%

Average Annual Total Returns (for the periods ended December 31, 2016)

After-tax returns are shown only for Open 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, 2016) 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.

Average Annual Returns - Lazard US Realty Equity Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Open Shares	4.99%	10.95%	18.89%	Dec. 31, 2008
Institutional Shares	5.31%	11.24%	14.69%	Sep. 26, 2011
R6 Shares	5.31%	8.04%	14.53%
After Taxes on Distributions | Open Shares	4.11%	9.14%	15.81%
After Taxes on Distributions and Sale of Fund Shares | Open Shares	3.12%	8.04%	14.53%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)	8.63%	11.98%	15.29%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)	8.63%	11.98%	14.05%

[1] Restated to reflect current management fee.

[2] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[3] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.00%, 1.30% and 0.95% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Label

Element

Value

Lazard US Realty Equity Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard US Realty Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objectives

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio’s primary investment objective is long-term capital appreciation,

Objective, Secondary [Text Block]

rr_ObjectiveSecondaryTextBlock

with current income, including interest and dividends from portfolio securities, as a secondary objective.

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. Investors transacting in Institutional 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, 2027

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 41% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

41.00%

Expenses Restated to Reflect Current [Text]

rr_ExpensesRestatedToReflectCurrent

Restated to reflect current management fee.

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 fee waiver and expense reimbursement arrangement described above. 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

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real estate-intensive (i.e. the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio also may invest up to 20% of its assets in equity and fixed-income securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

In addition to purchasing options, the Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Other Equity Securities Risk. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in rights and warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the right or warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of non-Realty Companies traded on national exchanges, which may affect a Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Small and Mid Cap Companies Risk. Many Realty Companies are small and mid cap companies, which 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 securities 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.

Preferred Securities Risk. There are various risks associated with investing in preferred securities. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, or redeem its issue at par earlier than the scheduled maturity. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

• Certain preferred securities may be substantially less liquid than many other securities, such as common stocks or US Government securities. Illiquid securities involve the risk that the securities will not be able to be sold at the time desired by the Portfolio or at prices approximating the value at which the Portfolio is carrying the securities on its books.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 interest rates in the US and other countries are at or near historic lows.

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.

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. 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and 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 any other investment companies and ETFs in which the Portfolio invests.

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.

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. Forward currency contracts, structured products 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 are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

Risk Lose Money [Text]

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table Year-by-Year Total Returns for Open Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA U.S. Realty Fund (the “Predecessor Realty Equity Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Equity Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.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]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
9/30/09 36.29%

Worst Quarter:
9/30/11 -17.99%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

36.29%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(17.99%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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]

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After-tax returns are shown only for Open Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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After-tax returns are shown only for Open 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, 2016) 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 US Realty Equity Portfolio | FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

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1 Year

rr_AverageAnnualReturnYear01

8.63%

5 Years

rr_AverageAnnualReturnYear05

11.98%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

15.29%

Lazard US Realty Equity Portfolio | FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

8.63%

5 Years

rr_AverageAnnualReturnYear05

11.98%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

14.05%

Lazard US Realty Equity Portfolio | Institutional Shares

Risk/Return:

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Management Fees

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0.75%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

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0.32%

Total Annual Portfolio Operating Expenses

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1.07%

Fee Waiver and Expense Reimbursement

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0.07%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

^[2]

Expense Example, with Redemption, 1 Year

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$ 102

Expense Example, with Redemption, 3 Years

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318

Expense Example, with Redemption, 5 Years

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552

Expense Example, with Redemption, 10 Years

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$ 1,225

1 Year

rr_AverageAnnualReturnYear01

5.31%

5 Years

rr_AverageAnnualReturnYear05

11.24%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

14.69%

Inception Date

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Sep. 26, 2011

Lazard US Realty Equity Portfolio | Open Shares

Risk/Return:

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Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.29%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.29%

Fee Waiver and Expense Reimbursement

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^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.29%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 131

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

409

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

708

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,556

Annual Return 2009

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59.47%

Annual Return 2010

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35.55%

Annual Return 2011

rr_AnnualReturn2011

9.91%

Annual Return 2012

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20.58%

Annual Return 2013

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1.58%

Annual Return 2014

rr_AnnualReturn2014

25.33%

Annual Return 2015

rr_AnnualReturn2015

4.34%

Annual Return 2016

rr_AnnualReturn2016

4.11%

1 Year

rr_AverageAnnualReturnYear01

4.99%

5 Years

rr_AverageAnnualReturnYear05

10.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

18.89%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2008

Lazard US Realty Equity Portfolio | Open Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.11%

5 Years

rr_AverageAnnualReturnYear05

9.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

15.81%

Lazard US Realty Equity Portfolio | Open Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.12%

5 Years

rr_AverageAnnualReturnYear05

8.04%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

14.53%

Lazard US Realty Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.75%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.32%

^[3]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.07%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.12%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.95%

^[2]

Other Expenses, New Fund, Based on Estimates [Text]

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“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

$ 97

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

303

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

525

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 1,166

Performance One Year or Less [Text]

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Returns shown below for the Portfolio’s R6 Shares (which were not operational as of December 31, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

5.31%

5 Years

rr_AverageAnnualReturnYear05

8.04%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

14.53%

[1] Restated to reflect current management fee.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2027, to the extent Total Annual Portfolio Operating Expenses exceed 1.00%, 1.30% and 0.95% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

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Lazard Global Realty Equity Portfolio

Lazard Global Realty Equity Portfolio

Investment Objectives

The Portfolio’s primary investment objective is long-term capital appreciation,

with current income, including interest and dividends from portfolio securities, as a secondary objective.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Global Realty Equity Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.85%	0.85%	0.85%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		4.40%	4.86%	4.40%	[1]
Total Annual Portfolio Operating Expenses		5.25%	5.96%	5.25%
Fee Waiver and Expense Reimbursement	[2]	4.25%	4.66%	4.25%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	1.00%	1.30%	1.00%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Global Realty Equity Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	102	1,191	2,275	4,961
Open Shares	132	1,357	2,558	5,460
R6 Shares	102	1,191	2,275	4,961

Portfolio Turnover

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 38% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of Realty Companies (defined below), as well as certain synthetic instruments relating to Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in Realty Companies and may include depositary receipts, including ADRs, GDRs and EDRs, warrants, rights, options and shares of ETFs. The Portfolio’s investments in non-US companies may include companies whose principal business activities are located in emerging market countries.

In addition, 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 non-US companies. The Investment Manager will allocate the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries).

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real estate-intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be Realty Companies), including, but not limited to, other investment companies.

The Portfolio’s investments in preferred stock and convertible securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

In addition to purchasing options, the Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Other Equity Securities Risk. Preferred stock is subject to credit and interest rate risk and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of non-Realty Companies traded on national exchanges, which may affect a Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Small and Mid Cap Companies Risk. Many Realty Companies are small and mid cap companies, which 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 securities 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.

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 can 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 interest rates in the US and other countries are at or near historic lows.

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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and 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 other investment companies and ETFs in which the Portfolio invests.

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.

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. Forward currency contracts, structured products 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 are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

Performance Bar Chart and Table Year-by-Year Total Returns for Open Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA International Realty Fund (the “Predecessor International Realty Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor International Realty Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
6/30/09 31.31%

Worst Quarter:
9/30/11 -22.48%

Average Annual Total Returns (for the periods ended December 31, 2016)

After-tax returns are shown only for Open 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, 2016) 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.

The FTSE EPRA/NAREIT Global ex-US/FTSE EPRA/NAREIT Global Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the FTSE EPRA/NAREIT Global ex-US Index for all periods through August 15, 2013 (when the Portfolio’s investment strategy changed from investing primarily in non-US Realty Companies to a global approach) and the FTSE EPRA/NAREIT Global Index for all periods thereafter.

Average Annual Returns - Lazard Global Realty Equity Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Open Shares	2.54%	10.45%	13.52%	Dec. 31, 2008
Institutional Shares	2.85%	10.78%	10.22%	Sep. 26, 2011
R6 Shares	2.85%	10.78%	10.22%
After Taxes on Distributions | Open Shares	1.51%	7.82%	10.66%
After Taxes on Distributions and Sale of Fund Shares | Open Shares	1.62%	7.28%	10.12%
FTSE EPRA/NAREIT Global Index (reflects no reduction for fees, expenses or taxes) (Open)	3.75%	8.88%	11.19%
FTSE EPRA/NAREIT Global Index (reflects no reduction for fees, expenses or taxes) (Institutional)	3.75%	8.88%	9.64%
FTSE EPRA/NAREIT Global ex-US/FTSE/NAREIT Global Linked Index (reflects no deduction for fees, expenses or taxes) (Open)	3.75%	10.36%	11.15%
FTSE EPRA/NAREIT Global ex-US/FTSE/NAREIT Global Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)	3.75%	10.36%	10.11%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.00%, 1.30% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

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Lazard Global Realty Equity Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard Global Realty Equity Portfolio

Objective [Heading]

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Investment Objectives

Objective, Primary [Text Block]

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The Portfolio’s primary investment objective is long-term capital appreciation,

Objective, Secondary [Text Block]

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with current income, including interest and dividends from portfolio securities, as a secondary objective.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional 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]

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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

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May 01, 2018

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 38% of the average value of its portfolio.

Portfolio Turnover, Rate

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38.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of Realty Companies (defined below), as well as certain synthetic instruments relating to Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in Realty Companies and may include depositary receipts, including ADRs, GDRs and EDRs, warrants, rights, options and shares of ETFs. The Portfolio’s investments in non-US companies may include companies whose principal business activities are located in emerging market countries.

In addition, 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 non-US companies. The Investment Manager will allocate the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries).

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real estate-intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be Realty Companies), including, but not limited to, other investment companies.

The Portfolio’s investments in preferred stock and convertible securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

In addition to purchasing options, the Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Other Equity Securities Risk. Preferred stock is subject to credit and interest rate risk and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of common stocks of non-Realty Companies traded on national exchanges, which may affect a Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Small and Mid Cap Companies Risk. Many Realty Companies are small and mid cap companies, which 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 securities 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.

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 can 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.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 interest rates in the US and other countries are at or near historic lows.

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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and 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 other investment companies and ETFs in which the Portfolio invests.

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.

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. Forward currency contracts, structured products 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 are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

Risk Lose Money [Text]

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

Risk Nondiversified Status [Text]

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The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table Year-by-Year Total Returns for Open Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA International Realty Fund (the “Predecessor International Realty Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor International Realty Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.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]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Realty Equity 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 Additional Market Index [Text]

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The FTSE EPRA/NAREIT Global ex-US/FTSE EPRA/NAREIT Global Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the FTSE EPRA/NAREIT Global ex-US Index for all periods through August 15, 2013 (when the Portfolio’s investment strategy changed from investing primarily in non-US Realty Companies to a global approach) and the FTSE EPRA/NAREIT Global Index for all periods thereafter.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
6/30/09 31.31%

Worst Quarter:
9/30/11 -22.48%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

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31.31%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.48%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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 Open 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 Open 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, 2016) 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.

The FTSE EPRA/NAREIT Global ex-US/FTSE EPRA/NAREIT Global Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the FTSE EPRA/NAREIT Global ex-US Index for all periods through August 15, 2013 (when the Portfolio’s investment strategy changed from investing primarily in non-US Realty Companies to a global approach) and the FTSE EPRA/NAREIT Global Index for all periods thereafter.

Lazard Global Realty Equity Portfolio | FTSE EPRA/NAREIT Global Index (reflects no reduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.75%

5 Years

rr_AverageAnnualReturnYear05

8.88%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

11.19%

Lazard Global Realty Equity Portfolio | FTSE EPRA/NAREIT Global Index (reflects no reduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.75%

5 Years

rr_AverageAnnualReturnYear05

8.88%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.64%

Lazard Global Realty Equity Portfolio | FTSE EPRA/NAREIT Global ex-US/FTSE/NAREIT Global Linked Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.75%

5 Years

rr_AverageAnnualReturnYear05

10.36%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

11.15%

Lazard Global Realty Equity Portfolio | FTSE EPRA/NAREIT Global ex-US/FTSE/NAREIT Global Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.75%

5 Years

rr_AverageAnnualReturnYear05

10.36%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.11%

Lazard Global Realty Equity Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.40%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

5.25%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

4.25%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,191

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

2,275

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 4,961

1 Year

rr_AverageAnnualReturnYear01

2.85%

5 Years

rr_AverageAnnualReturnYear05

10.78%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.22%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 26, 2011

Lazard Global Realty Equity Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

4.86%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

5.96%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

4.66%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,357

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

2,558

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 5,460

Annual Return 2009

rr_AnnualReturn2009

89.06%

Annual Return 2010

rr_AnnualReturn2010

11.46%

Annual Return 2011

rr_AnnualReturn2011

(20.35%)

Annual Return 2012

rr_AnnualReturn2012

44.81%

Annual Return 2013

rr_AnnualReturn2013

0.60%

Annual Return 2014

rr_AnnualReturn2014

10.05%

Annual Return 2015

rr_AnnualReturn2015

(0.01%)

Annual Return 2016

rr_AnnualReturn2016

1.51%

1 Year

rr_AverageAnnualReturnYear01

2.54%

5 Years

rr_AverageAnnualReturnYear05

10.45%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

13.52%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2008

Lazard Global Realty Equity Portfolio | Open Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.51%

5 Years

rr_AverageAnnualReturnYear05

7.82%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.66%

Lazard Global Realty Equity Portfolio | Open Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

1.62%

5 Years

rr_AverageAnnualReturnYear05

7.28%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.12%

Lazard Global Realty Equity Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.40%

^[2]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

5.25%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

4.25%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

^[1]

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

$ 102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,191

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

2,275

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 4,961

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

2.85%

5 Years

rr_AverageAnnualReturnYear05

10.78%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.22%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.00%, 1.30% and 1.00% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

XML

Lazard Global Listed Infrastructure Portfolio

Lazard Global Listed Infrastructure Portfolio

Investment Objective

The Portfolio seeks total return.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Global Listed Infrastructure Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.90%	0.90%	0.90%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		0.06%	0.07%	0.06%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses	[2]	0.97%	1.23%	0.97%

Example

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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Global Listed Infrastructure Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	99	309	536	1,190
Open Shares	125	390	676	1,489
R6 Shares	99	309	536	1,190

Portfolio Turnover

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 35% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of infrastructure companies and concentrates its investments in industries represented by infrastructure companies. The Investment Manager focuses on companies with a minimum market capitalization of $250 million that own physical infrastructure and which the Investment Manager believes are undervalued.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of infrastructure companies, which consist of utilities, pipelines, toll roads, airports, railroads, ports, telecommunications and other infrastructure companies, with securities listed on a national or other recognized securities exchange.

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 infrastructure companies organized or located outside the US or doing a substantial amount of business outside the US. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio may invest in equity securities of companies with some business activities located in emerging market countries.

The Investment Manager generally seeks to substantially hedge foreign currency exposure in the Portfolio against movements relative to the US dollar by entering into foreign currency forward contracts, although the Portfolio’s total foreign currency exposure may not be fully hedged at all times.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to, among other factors, regulation by various government authorities, including rate regulation and service interruption due to environmental, operational or other mishaps.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Foreign Currency and Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Forward Currency Contracts Risk. Forward currency contracts may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested. Forward currency contracts are subject to the risk of default by the counterparty to the contracts and can be illiquid. These contracts are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of forward currency contracts, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Listed Infrastructure 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.LazardNet.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.

Best Quarter:
9/30/10 12.17%

Worst Quarter:
9/30/11 -9.85%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

The Custom Infrastructure Index (Hedged) is an index created by the Portfolio’s Investment Manager, which is the performance of the UBS Global 50/50 Infrastructure & Utilities^® Index (Hedged) for all periods through March 31, 2015, when the index ceased to be published, and the FTSE Developed Core Infrastructure 50/50^® Index (Hedged) for all periods thereafter.

Average Annual Returns - Lazard Global Listed Infrastructure Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	9.30%	16.05%	11.99%	Dec. 31, 2009
Open Shares	9.01%	15.71%	11.64%	Dec. 31, 2009
R6 Shares	9.30%	16.05%	11.99%
After Taxes on Distributions | Institutional Shares	8.66%	13.95%	10.40%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	6.21%	12.55%	9.47%
Custom Infrastructure Index (Hedged) (reflects no deduction for fees, expenses or taxes)	11.81%	12.55%	9.31%
MSCI World Index (reflects no deduction for fees, expenses or taxes)	7.51%	10.41%	8.17%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

[2] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses are .96%, 1.22% and .96% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard Global Listed Infrastructure Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Global Listed Infrastructure 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. Investors transacting in Institutional 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)

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 35% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

35.00%

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. 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 Portfolio invests primarily in equity securities, principally common stocks, of infrastructure companies and concentrates its investments in industries represented by infrastructure companies. The Investment Manager focuses on companies with a minimum market capitalization of $250 million that own physical infrastructure and which the Investment Manager believes are undervalued.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of infrastructure companies, which consist of utilities, pipelines, toll roads, airports, railroads, ports, telecommunications and other infrastructure companies, with securities listed on a national or other recognized securities exchange.

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 infrastructure companies organized or located outside the US or doing a substantial amount of business outside the US. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio may invest in equity securities of companies with some business activities located in emerging market countries.

The Investment Manager generally seeks to substantially hedge foreign currency exposure in the Portfolio against movements relative to the US dollar by entering into foreign currency forward contracts, although the Portfolio’s total foreign currency exposure may not be fully hedged at all times.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to, among other factors, regulation by various government authorities, including rate regulation and service interruption due to environmental, operational or other mishaps.

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 can 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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Foreign Currency and Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Forward Currency Contracts Risk. Forward currency contracts may increase volatility or reduce returns, perhaps substantially, particularly since most derivatives have a leverage component that provides investment exposure in excess of the amount invested. Forward currency contracts are subject to the risk of default by the counterparty to the contracts and can be illiquid. These contracts are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of forward currency contracts, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 Listed Infrastructure 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.LazardNet.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 Listed Infrastructure 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 Additional Market Index [Text]

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The Custom Infrastructure Index (Hedged) is an index created by the Portfolio’s Investment Manager, which is the performance of the UBS Global 50/50 Infrastructure & Utilities® Index (Hedged) for all periods through March 31, 2015, when the index ceased to be published, and the FTSE Developed Core Infrastructure 50/50® Index (Hedged) for all periods thereafter.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
9/30/10 12.17%

Worst Quarter:
9/30/11 -9.85%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Sep. 30, 2010

Highest Quarterly Return

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12.17%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Sep. 30, 2011

Lowest Quarterly Return

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(9.85%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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]

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After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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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, 2016) 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.

The Custom Infrastructure Index (Hedged) is an index created by the Portfolio’s Investment Manager, which is the performance of the UBS Global 50/50 Infrastructure & Utilities^® Index (Hedged) for all periods through March 31, 2015, when the index ceased to be published, and the FTSE Developed Core Infrastructure 50/50^® Index (Hedged) for all periods thereafter.

Lazard Global Listed Infrastructure Portfolio | Custom Infrastructure Index (Hedged) (reflects no deduction for fees, expenses or taxes)

Risk/Return:

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1 Year

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11.81%

5 Years

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12.55%

Life of Portfolio

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9.31%

Lazard Global Listed Infrastructure Portfolio | MSCI World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

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1 Year

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7.51%

5 Years

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10.41%

Life of Portfolio

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8.17%

Lazard Global Listed Infrastructure Portfolio | Institutional Shares

Risk/Return:

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Management Fees

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0.90%

Distribution and Service (12b-1) Fees

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none

Other Expenses

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0.06%

Acquired Fund Fees and Expenses (Underlying Funds)

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0.01%

Total Annual Portfolio Operating Expenses

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0.97%

^[1]

Expense Example, with Redemption, 1 Year

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$ 99

Expense Example, with Redemption, 3 Years

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309

Expense Example, with Redemption, 5 Years

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536

Expense Example, with Redemption, 10 Years

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$ 1,190

Annual Return 2010

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6.63%

Annual Return 2011

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(1.55%)

Annual Return 2012

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18.05%

Annual Return 2013

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26.56%

Annual Return 2014

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17.95%

Annual Return 2015

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9.30%

Annual Return 2016

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9.30%

1 Year

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9.30%

5 Years

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16.05%

Life of Portfolio

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11.99%

Inception Date

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Dec. 31, 2009

Lazard Global Listed Infrastructure Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

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1 Year

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8.66%

5 Years

rr_AverageAnnualReturnYear05

13.95%

Life of Portfolio

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10.40%

Lazard Global Listed Infrastructure Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

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1 Year

rr_AverageAnnualReturnYear01

6.21%

5 Years

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12.55%

Life of Portfolio

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9.47%

Lazard Global Listed Infrastructure Portfolio | Open Shares

Risk/Return:

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Management Fees

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0.90%

Distribution and Service (12b-1) Fees

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0.25%

Other Expenses

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0.07%

Acquired Fund Fees and Expenses (Underlying Funds)

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0.01%

Total Annual Portfolio Operating Expenses

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1.23%

^[1]

Expense Example, with Redemption, 1 Year

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$ 125

Expense Example, with Redemption, 3 Years

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390

Expense Example, with Redemption, 5 Years

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676

Expense Example, with Redemption, 10 Years

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$ 1,489

1 Year

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9.01%

5 Years

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15.71%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

11.64%

Inception Date

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Dec. 31, 2009

Lazard Global Listed Infrastructure Portfolio | R6 Shares

Risk/Return:

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Management Fees

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0.90%

Distribution and Service (12b-1) Fees

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none

Other Expenses

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0.06%

^[2]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

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0.97%

^[1]

Other Expenses, New Fund, Based on Estimates [Text]

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“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

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$ 99

Expense Example, with Redemption, 3 Years

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309

Expense Example, with Redemption, 5 Years

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536

Expense Example, with Redemption, 10 Years

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$ 1,190

Performance One Year or Less [Text]

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Returns shown below for the Portfolio’s R6 Shares (which were not operational as of December 31, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

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9.30%

5 Years

rr_AverageAnnualReturnYear05

16.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

11.99%

[1] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses are .96%, 1.22% and .96% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[2] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.

XML

Lazard Real Assets and Pricing Opportunities Portfolio

Lazard Real Assets and Pricing Opportunities Portfolio

Investment Objective

The Portfolio seeks total return consisting of appreciation and income.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Real Assets and Pricing Opportunities Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.70%	0.70%	0.70%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses (including expenses of the Portfolio’s subsidiary)	[1]	0.41%	0.41%	0.41%
Total Annual Portfolio Operating Expenses	[1]	1.11%	1.36%	1.11%
Fee Waiver and Expense Reimbursement	[2]	0.21%	0.21%	0.26%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.90%	1.15%	0.85%

Example

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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Real Assets and Pricing Opportunities Portfolio - USD ($)	1 Year	3 Years
Institutional Shares	92	317
Open Shares	117	396
R6 Shares	87	309

Portfolio Turnover

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. Because the Portfolio commenced investment operations on December 30, 2016, no portfolio turnover information is presented.

Principal Investment Strategies

Under normal market conditions, the Portfolio invests at least 80% of its assets in real assets and pricing opportunities investments, including instruments providing exposure to such investments (such as derivative instruments).

“Real assets” are considered by the Portfolio to be:

(i) assets that have physical properties, such as:

• natural resources, such as energy and materials (e.g., metals and mining, paper and forestry and chemicals)

• real estate, such as REITs and real estate operating companies (“Real Estate Investments”)

• equipment and industrials, such as tools, hardware, machinery and other industrial components

• infrastructure, such as utilities, transport, communications, pipelines, seaports, airports and toll roads

• commodities, such as physical commodities with tangible properties such as gas, oil, metals, livestock or agricultural products

(ii) companies that own or derive a significant portion of their value from such assets listed above or the production thereof; and (iii) inflation-indexed securities.

“Pricing opportunities” investments are made in companies that the Investment Manager believes may perform well during periods of high inflation. Such companies may include those in the consumer discretionary, consumer staples, health care, information technology and telecommunications services sectors.

Allocation of the Portfolio’s assets by the Investment Manager among these real assets categories and pricing opportunities sectors will vary, and over time exposures to new categories and sectors may be added or exposures to existing categories and sectors may be eliminated.

The Portfolio may invest in a mix of equity and fixed income securities of US and non-US companies, including emerging markets companies, as well as commodity-linked and other derivative instruments. In addition to investing in inflation-indexed fixed income securities (which may be of any credit quality or maturity), the Portfolio may invest in fixed income securities, typically government securities (which may be of various maturities), in connection with the Portfolio’s derivatives exposures (i.e., a type of margin or collateral). The Portfolio’s investments in fixed income securities also may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”). The Portfolio also may invest in ETFs and similar products such as exchange-traded notes (“ETNs”), which generally pursue a passive index-based strategy. The Portfolio may invest in companies of any market capitalization.

The Portfolio may gain exposure to the commodity markets by investing up to 25% of the Portfolio’s total assets in a wholly-owned subsidiary formed under the laws of the Cayman Islands (the “Subsidiary”), which invests mainly in commodity-linked derivative instruments (including, but not limited to, futures contracts, options and total return swaps) and fixed income securities, typically government securities, in connection with the Subsidiary’s derivatives exposures (i.e., a type of margin or collateral).

The Investment Manager’s process for selecting investments for the Portfolio may include a variety of approaches, such a fundamental, bottom-up analysis, qualitative evaluations and quantitative models or a combination of these or other approaches. The process used will usually vary for different types of real assets categories, or category subsets.

In addition, the Portfolio may, but is not required to (1) enter into futures contracts; forward currency contracts; equity, total return, interest rate, credit default and currency swap agreements; (2) write put and call options on securities (including ETFs), indexes and currencies; and (3) invest in structured notes, in each case for hedging purposes or to seek to increase returns, including as a substitute for a direct investment in securities. When the Portfolio or the Subsidiary enters into derivatives transactions, it may be required to segregate liquid assets or enter into offsetting positions, in accordance with applicable regulations.

Principal Investment Risks

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 real assets categories. 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.

Natural Resources Risk. Investments related to natural resources may be affected by numerous factors, including events occurring in nature, inflationary pressures and domestic and international politics. For example, events occurring in nature (such as earthquakes or fires in prime natural resource areas) and political events (such as coups or military confrontations) can affect the overall supply of a natural resource and the value of companies involved in such natural resource. Political risks and other risks to which non-US companies are subject also may affect US companies if they have significant operations or investments in non-US countries. In addition, interest rates, prices of raw materials and other commodities, international economic developments, energy conservation, tax and other government regulations (both US and non-US) may affect the supply of and demand for natural resources, which can affect the profitability and value of securities issued by companies in the natural resources category. Securities of companies within specific natural resources sub-categories can perform differently than the overall market. This may be due to changes in such things as the regulatory or competitive environment or to changes in investor perceptions.

Real Estate Investments Risk. The Portfolio’s investments in Real Estate Investments could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, Real Estate Investments could lead to investment results that may be significantly different from investments in other real assets categories or investments in the broader securities markets.

The risks related to investments in Real Estate Investments include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of other types of stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to, among other factors, regulation by various government authorities, including rate regulation, and service interruption due to environmental, operational or other mishaps.

Commodities-Related Investments Risk. Exposure to the commodities markets may subject the Portfolio and the Subsidiary to greater volatility than other types of investments. The values of commodities and commodity-linked derivative instruments are affected by events that may have less impact on the values of equity and fixed income securities. Investments linked to the prices of commodities are considered speculative. Because the value of a commodity-linked derivative instrument, such as a futures contract on a physical commodity, typically is based upon the price movements of the underlying reference asset, index or rate, the value of these instruments will rise or fall in response to changes in the underlying reference asset, index or rate. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods for a variety of factors, including: changes in supply and demand relationships; weather; agricultural or livestock markets; agricultural or livestock disease or pestilence; trade relationships; fiscal, monetary and exchange control programs; and embargoes, tariffs, terrorism and international economic, political, military and regulatory developments.

Inflation-Indexed Security Risk. Interest payments on inflation-indexed securities can be unpredictable and will vary as the principal and/or interest is periodically adjusted based on the rate of inflation. If the index measuring inflation falls, the interest payable on these securities will be reduced. The US Treasury has guaranteed that, in the event of a drop in prices, it would repay the par amount of its inflation-indexed securities. Inflation-indexed securities issued by corporations generally do not guarantee repayment of principal. Any increase in the principal amount of an inflation-indexed security will be considered taxable ordinary income, even though investors do not receive their principal until maturity. As a result, the Portfolio may be required to make annual distributions to shareholders that exceed the cash the Portfolio received, which may cause the Portfolio to liquidate certain investments when it is not advantageous to do so. Also, if the principal value of an inflation-indexed security is adjusted downward due to deflation, amounts previously distributed may be characterized in some circumstances as a return of capital.

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 interest rates in the US and other countries are at or near historic lows.

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 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 derivative transactions.

Government Securities Risk. Not all obligations of the US government, its agencies and instrumentalities are backed by the full faith and credit of the US Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the US government or its agencies or instrumentalities of a security held by the Portfolio does not apply to the market value of such security or to shares of the Portfolio itself. A security backed by the US Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. 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.

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 a 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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. 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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including ETFs), 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 and difficult to value. 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 reference asset, index or rate. 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. The same risks, as applicable, apply to derivatives transactions by the Subsidiary.

ETFs and Similar Products Risk. Shares of ETFs and similar products such as ETNs in which the Portfolio may invest may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs, ETNs and similar products may trade at prices at, below or above their most recent NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in ETFs and similar products are subject to the risks of investments made by the ETFs and similar products, as well as to the general risks of investing in ETFs and similar products. 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 and similar products in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

Tax Status Risk. Income and gains from commodities or certain commodity-linked derivative instruments do not constitute “qualifying income” to the Portfolio for purposes of qualification as a “regulated investment company” (“RIC”) for federal income tax purposes. Without such qualification, the Portfolio could be subject to tax. The tax treatment of some of the Portfolio’s investments in the Subsidiary and commodity-linked derivatives may be adversely affected by future legislation, regulations of the US Treasury Department or guidance issued by the Internal Revenue Service (the “IRS”), or otherwise affect the character, timing and/or amount of the Portfolio’s taxable income or any gains and distributions made by the Portfolio.

Subsidiary Risk. The Portfolio invests in the Subsidiary, which is not registered as an investment company under the 1940 Act. A regulatory change in the US or the Cayman Islands, under which the Portfolio and the Subsidiary, respectively, are organized, that impacts the Subsidiary or how the Portfolio invests in the Subsidiary, such as a change in tax law, could adversely affect the Portfolio. By investing in the Subsidiary, the Portfolio is exposed to the risks associated with the Subsidiary’s investments, which generally include the risks of investing in commodity-related derivative instruments (described elsewhere in this Prospectus).

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.

Performance Bar Chart and Table

Because the Portfolio did not have a full calendar year of performance prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. Updated performance information is available at www.LazardNet.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.

[1] Other Expenses are based on estimated amounts for the current fiscal year. Other Expenses and Total Annual Portfolio Operating Expenses include the estimated expenses of the Portfolio's subsidiary, which will vary based on the amount of the Portfolio's investment in the subsidiary. The expenses of the subsidiary included in Other Expenses reflect the Portfolio's anticipated average allocation to the subsidiary.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until December 30, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.15% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

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Lazard Real Assets and Pricing Opportunities Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard Real Assets and Pricing Opportunities Portfolio

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The Portfolio seeks total return consisting of appreciation and income.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional 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]

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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

Dec. 30, 2018

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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. Because the Portfolio commenced investment operations on December 30, 2016, no portfolio turnover information is presented.

Other Expenses, New Fund, Based on Estimates [Text]

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Other Expenses are based on estimated amounts for the current fiscal year.

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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Under normal market conditions, the Portfolio invests at least 80% of its assets in real assets and pricing opportunities investments, including instruments providing exposure to such investments (such as derivative instruments).

“Real assets” are considered by the Portfolio to be:

(i) assets that have physical properties, such as:

• natural resources, such as energy and materials (e.g., metals and mining, paper and forestry and chemicals)

• real estate, such as REITs and real estate operating companies (“Real Estate Investments”)

• equipment and industrials, such as tools, hardware, machinery and other industrial components

• infrastructure, such as utilities, transport, communications, pipelines, seaports, airports and toll roads

• commodities, such as physical commodities with tangible properties such as gas, oil, metals, livestock or agricultural products

(ii) companies that own or derive a significant portion of their value from such assets listed above or the production thereof; and (iii) inflation-indexed securities.

“Pricing opportunities” investments are made in companies that the Investment Manager believes may perform well during periods of high inflation. Such companies may include those in the consumer discretionary, consumer staples, health care, information technology and telecommunications services sectors.

Allocation of the Portfolio’s assets by the Investment Manager among these real assets categories and pricing opportunities sectors will vary, and over time exposures to new categories and sectors may be added or exposures to existing categories and sectors may be eliminated.

The Portfolio may invest in a mix of equity and fixed income securities of US and non-US companies, including emerging markets companies, as well as commodity-linked and other derivative instruments. In addition to investing in inflation-indexed fixed income securities (which may be of any credit quality or maturity), the Portfolio may invest in fixed income securities, typically government securities (which may be of various maturities), in connection with the Portfolio’s derivatives exposures (i.e., a type of margin or collateral). The Portfolio’s investments in fixed income securities also may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”). The Portfolio also may invest in ETFs and similar products such as exchange-traded notes (“ETNs”), which generally pursue a passive index-based strategy. The Portfolio may invest in companies of any market capitalization.

The Portfolio may gain exposure to the commodity markets by investing up to 25% of the Portfolio’s total assets in a wholly-owned subsidiary formed under the laws of the Cayman Islands (the “Subsidiary”), which invests mainly in commodity-linked derivative instruments (including, but not limited to, futures contracts, options and total return swaps) and fixed income securities, typically government securities, in connection with the Subsidiary’s derivatives exposures (i.e., a type of margin or collateral).

The Investment Manager’s process for selecting investments for the Portfolio may include a variety of approaches, such a fundamental, bottom-up analysis, qualitative evaluations and quantitative models or a combination of these or other approaches. The process used will usually vary for different types of real assets categories, or category subsets.

In addition, the Portfolio may, but is not required to (1) enter into futures contracts; forward currency contracts; equity, total return, interest rate, credit default and currency swap agreements; (2) write put and call options on securities (including ETFs), indexes and currencies; and (3) invest in structured notes, in each case for hedging purposes or to seek to increase returns, including as a substitute for a direct investment in securities. When the Portfolio or the Subsidiary enters into derivatives transactions, it may be required to segregate liquid assets or enter into offsetting positions, in accordance with applicable regulations.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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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 real assets categories. 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.

Natural Resources Risk. Investments related to natural resources may be affected by numerous factors, including events occurring in nature, inflationary pressures and domestic and international politics. For example, events occurring in nature (such as earthquakes or fires in prime natural resource areas) and political events (such as coups or military confrontations) can affect the overall supply of a natural resource and the value of companies involved in such natural resource. Political risks and other risks to which non-US companies are subject also may affect US companies if they have significant operations or investments in non-US countries. In addition, interest rates, prices of raw materials and other commodities, international economic developments, energy conservation, tax and other government regulations (both US and non-US) may affect the supply of and demand for natural resources, which can affect the profitability and value of securities issued by companies in the natural resources category. Securities of companies within specific natural resources sub-categories can perform differently than the overall market. This may be due to changes in such things as the regulatory or competitive environment or to changes in investor perceptions.

Real Estate Investments Risk. The Portfolio’s investments in Real Estate Investments could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, Real Estate Investments could lead to investment results that may be significantly different from investments in other real assets categories or investments in the broader securities markets.

The risks related to investments in Real Estate Investments include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing.

Due to certain special considerations that apply to REITs, investments in REITs may carry additional risks not necessarily present in investments in other securities. REIT securities (including those trading on national exchanges) typically have trading volumes that are less than those of other types of stocks traded on national exchanges, which may affect the Portfolio’s ability to trade or liquidate those securities. An investment in REITs may be adversely affected if the REIT fails to comply with applicable laws and regulations, including failing to qualify as a REIT under the Code. Failure to qualify with any of these requirements could jeopardize a company’s status as a REIT. The Portfolio generally will have no control over the operations and policies of a REIT, and the Portfolio generally will have no ability to cause a REIT to take the actions necessary to qualify as a REIT.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to, among other factors, regulation by various government authorities, including rate regulation, and service interruption due to environmental, operational or other mishaps.

Commodities-Related Investments Risk. Exposure to the commodities markets may subject the Portfolio and the Subsidiary to greater volatility than other types of investments. The values of commodities and commodity-linked derivative instruments are affected by events that may have less impact on the values of equity and fixed income securities. Investments linked to the prices of commodities are considered speculative. Because the value of a commodity-linked derivative instrument, such as a futures contract on a physical commodity, typically is based upon the price movements of the underlying reference asset, index or rate, the value of these instruments will rise or fall in response to changes in the underlying reference asset, index or rate. Prices of commodities and commodity-linked investments may fluctuate significantly over short periods for a variety of factors, including: changes in supply and demand relationships; weather; agricultural or livestock markets; agricultural or livestock disease or pestilence; trade relationships; fiscal, monetary and exchange control programs; and embargoes, tariffs, terrorism and international economic, political, military and regulatory developments.

Inflation-Indexed Security Risk. Interest payments on inflation-indexed securities can be unpredictable and will vary as the principal and/or interest is periodically adjusted based on the rate of inflation. If the index measuring inflation falls, the interest payable on these securities will be reduced. The US Treasury has guaranteed that, in the event of a drop in prices, it would repay the par amount of its inflation-indexed securities. Inflation-indexed securities issued by corporations generally do not guarantee repayment of principal. Any increase in the principal amount of an inflation-indexed security will be considered taxable ordinary income, even though investors do not receive their principal until maturity. As a result, the Portfolio may be required to make annual distributions to shareholders that exceed the cash the Portfolio received, which may cause the Portfolio to liquidate certain investments when it is not advantageous to do so. Also, if the principal value of an inflation-indexed security is adjusted downward due to deflation, amounts previously distributed may be characterized in some circumstances as a return of capital.

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 interest rates in the US and other countries are at or near historic lows.

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 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 derivative transactions.

Government Securities Risk. Not all obligations of the US government, its agencies and instrumentalities are backed by the full faith and credit of the US Treasury. Some obligations are backed only by the credit of the issuing agency or instrumentality, and in some cases there may be some risk of default by the issuer. Any guarantee by the US government or its agencies or instrumentalities of a security held by the Portfolio does not apply to the market value of such security or to shares of the Portfolio itself. A security backed by the US Treasury or the full faith and credit of the United States is guaranteed only as to the timely payment of interest and principal when held to maturity.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. 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.

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 a 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, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.

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.

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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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. 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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including ETFs), 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 and difficult to value. 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 reference asset, index or rate. 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. The same risks, as applicable, apply to derivatives transactions by the Subsidiary.

ETFs and Similar Products Risk. Shares of ETFs and similar products such as ETNs in which the Portfolio may invest may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs, ETNs and similar products may trade at prices at, below or above their most recent NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in ETFs and similar products are subject to the risks of investments made by the ETFs and similar products, as well as to the general risks of investing in ETFs and similar products. 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 and similar products in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

Tax Status Risk. Income and gains from commodities or certain commodity-linked derivative instruments do not constitute “qualifying income” to the Portfolio for purposes of qualification as a “regulated investment company” (“RIC”) for federal income tax purposes. Without such qualification, the Portfolio could be subject to tax. The tax treatment of some of the Portfolio’s investments in the Subsidiary and commodity-linked derivatives may be adversely affected by future legislation, regulations of the US Treasury Department or guidance issued by the Internal Revenue Service (the “IRS”), or otherwise affect the character, timing and/or amount of the Portfolio’s taxable income or any gains and distributions made by the Portfolio.

Subsidiary Risk. The Portfolio invests in the Subsidiary, which is not registered as an investment company under the 1940 Act. A regulatory change in the US or the Cayman Islands, under which the Portfolio and the Subsidiary, respectively, are organized, that impacts the Subsidiary or how the Portfolio invests in the Subsidiary, such as a change in tax law, could adversely affect the Portfolio. By investing in the Subsidiary, the Portfolio is exposed to the risks associated with the Subsidiary’s investments, which generally include the risks of investing in commodity-related derivative instruments (described elsewhere in this Prospectus).

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]

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

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table

Performance Narrative [Text Block]

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Because the Portfolio did not have a full calendar year of performance prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. Updated performance information is available at www.LazardNet.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]

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Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Lazard Real Assets and Pricing Opportunities Portfolio | Institutional Shares

Risk/Return:

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Management Fees

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0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses (including expenses of the Portfolio’s subsidiary)

rr_Component1OtherExpensesOverAssets

0.41%

^[1]

Total Annual Portfolio Operating Expenses

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1.11%

^[1]

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.21%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

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0.90%

^[2]

Expense Example, with Redemption, 1 Year

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$ 92

Expense Example, with Redemption, 3 Years

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$ 317

Lazard Real Assets and Pricing Opportunities Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses (including expenses of the Portfolio’s subsidiary)

rr_Component1OtherExpensesOverAssets

0.41%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.36%

^[1]

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.21%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.15%

^[2]

Expense Example, with Redemption, 1 Year

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$ 117

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 396

Lazard Real Assets and Pricing Opportunities Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses (including expenses of the Portfolio’s subsidiary)

rr_Component1OtherExpensesOverAssets

0.41%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.11%

^[1]

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.26%

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.85%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 87

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 309

[1] Other Expenses are based on estimated amounts for the current fiscal year. Other Expenses and Total Annual Portfolio Operating Expenses include the estimated expenses of the Portfolio's subsidiary, which will vary based on the amount of the Portfolio's investment in the subsidiary. The expenses of the subsidiary included in Other Expenses reflect the Portfolio's anticipated average allocation to the subsidiary.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until December 30, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.15% and .85% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

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Lazard Enhanced Opportunities Portfolio

Lazard Enhanced Opportunities Portfolio

Investment Objective

The Portfolio seeks current income and long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Enhanced Opportunities Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees	[1]	1.30%	1.30%	1.30%
Distribution and Service (12b-1) Fees		none	0.25%	none
Dividend Expenses on Securities Sold Short	[2]	0.09%	0.12%	0.09%	[3]
Borrowing Expenses on Securities Sold Short	[4]
Remainder of Other Expenses		2.11%	13.69%	2.11%	[3]
Total Other Expenses		2.20%	13.81%	2.20%	[3]
Acquired Fund Fees and Expenses (Underlying Funds)		0.05%	0.05%	0.05%
Total Annual Portfolio Operating Expenses		3.55%	15.41%	3.55%
Fee Waiver and Expense Reimbursement	[5]	1.81%	13.39%	1.86%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[6]	1.74%	2.02%	1.69%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Enhanced Opportunities Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	177	941	1,726	3,782
Open Shares	205	3,091	5,396	9,328
R6 Shares	172	936	1,721	3,779

Portfolio Turnover

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. For the last fiscal year, the Portfolio’s portfolio turnover rate was 247% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio seeks to achieve its investment objective over a full market cycle through a hedged strategy investing primarily in convertible fixed income and preferred securities (including those rated below investment grade (“junk”)). The strategy utilizes a relative value approach, focusing on convertible securities that are considered to have low volatility. It is expected that the Portfolio will invest primarily in small and mid cap companies. The Portfolio also will utilize selective strategy level and position level hedges, primarily through short selling and derivatives, seeking to minimize macro risk (equity and credit) and interest rate risk. The Portfolio may invest in convertible debt and preferred securities of any maturity and any quality. Convertible securities held in the Portfolio generally are expected to have maturities between three and seven years at the time of investment, or between five and seven years if invested at issuance. Preferred securities generally are of perpetual maturities, callable at various points determined by the issuer. The Portfolio management team utilizes bottom up fundamental credit, equity and quantitative analysis in conjunction with top down macroeconomic analysis to identify individual securities believed to offer compelling value versus comparable risk return.

The Portfolio will generally have short positions through selling securities “short” and through investments in derivative instruments, principally swap agreements on individual securities, and may use short positions to seek to increase returns or to reduce risk. A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

Although the Portfolio’s investment focus is US companies, the Portfolio also may invest in non-US companies, including depositary receipts and shares. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in convertible fixed income and preferred securities and/or take short positions and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

In addition, the Portfolio may, but is not required to (1) enter into futures and forward currency contracts and equity, interest rate, credit default and currency swap agreements; and (2) write put and call options on securities (including ETFs), indexes and currencies, in each case for hedging purposes or to seek to increase returns.

It is expected that the Portfolio will buy and sell securities, and take short positions in securities, frequently in connection with implementing its investment strategy.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

Convertible Securities Risk. The market value of convertible securities may perform like that of non-convertible fixed income securities; that is, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). In addition, convertible securities are subject to the risk that the issuer will not make interest or principal payments, or will not make payments on a timely basis. Since it derives a portion of its value from the common stock into which it may be converted, a convertible security also is subject to the same types of market and issuer risks that apply to the underlying common stock.

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 interest rates in the US and other countries are at or near historic lows.

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 fixed income securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although such securities will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

Preferred Securities Risk. There are various risks associated with investing in preferred securities. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, or redeem, its issue at par earlier than the scheduled maturity. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs), indexes and currencies 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, interest rate, index, commodity, currency or other reference asset. 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 when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent on counterparties to its securities borrowing transactions in connection with short sales of securities and counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in a loss of Portfolio assets used as collateral or the loss of monies owed to the Portfolio by a counterparty.

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.

Leverage Risk. The use of leverage, which the Portfolio’s strategy entails, may magnify the Portfolio’s gains or losses.

Value Investing Risk. The Portfolio invests 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 securities in which the Portfolio invests may respond differently to market and other developments than other types of securities.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Market Direction Risk. Since the Portfolio will typically hold both long and short positions, an investment in the Portfolio will involve market risks associated with different types of investment decisions than those made for a typical “long only” fund. The Portfolio’s results will suffer both when there is a general market advance and the Portfolio holds significant “short” positions, or when there is a general market decline and the Portfolio holds significant “long” positions. In recent years, the markets have shown considerable volatility from day to day and even in intra-day trading.

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.

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.

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 Investment Manager does not intend to actively hedge the Portfolio’s foreign currency exposure.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Enhanced Opportunities 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
9/30/16 2.33%

Worst Quarter:
12/31/15 -1.64%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Enhanced Opportunities Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	4.50%	1.03%	Dec. 31, 2014
Open Shares	4.13%	0.72%	Dec. 31, 2014
R6 Shares	4.50%	1.03%
After Taxes on Distributions | Institutional Shares	3.87%	(1.23%)
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	2.55%	(0.25%)
BofA Merrill Lynch U.S. Convertible ex Mandatory Index (reflects no deduction for fees, expenses or taxes)	11.71%	4.23%
HFRX Global Hedge Fund Index (reflects no deduction for fees, expenses or taxes)	2.50%	(0.62%)

[1] Restated to reflect current management fee.

[2] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[3] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares for the last fiscal year.

[4] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[5] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.60%, 1.85% and 1.55% 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, dividend and interest expenses on securities sold short, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[6] Excluding Dividend Expenses on Securities Sold Short and Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.60%, 1.85% and 1.55% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

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Value

Lazard Enhanced Opportunities Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard Enhanced Opportunities Portfolio

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The Portfolio seeks current income and long-term capital appreciation.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional 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]

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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

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May 01, 2018

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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. For the last fiscal year, the Portfolio’s portfolio turnover rate was 247% of the average value of its portfolio.

Portfolio Turnover, Rate

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247.00%

Expenses Restated to Reflect Current [Text]

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Restated to reflect current management fee.

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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The Portfolio seeks to achieve its investment objective over a full market cycle through a hedged strategy investing primarily in convertible fixed income and preferred securities (including those rated below investment grade (“junk”)). The strategy utilizes a relative value approach, focusing on convertible securities that are considered to have low volatility. It is expected that the Portfolio will invest primarily in small and mid cap companies. The Portfolio also will utilize selective strategy level and position level hedges, primarily through short selling and derivatives, seeking to minimize macro risk (equity and credit) and interest rate risk. The Portfolio may invest in convertible debt and preferred securities of any maturity and any quality. Convertible securities held in the Portfolio generally are expected to have maturities between three and seven years at the time of investment, or between five and seven years if invested at issuance. Preferred securities generally are of perpetual maturities, callable at various points determined by the issuer. The Portfolio management team utilizes bottom up fundamental credit, equity and quantitative analysis in conjunction with top down macroeconomic analysis to identify individual securities believed to offer compelling value versus comparable risk return.

The Portfolio will generally have short positions through selling securities “short” and through investments in derivative instruments, principally swap agreements on individual securities, and may use short positions to seek to increase returns or to reduce risk. A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

Although the Portfolio’s investment focus is US companies, the Portfolio also may invest in non-US companies, including depositary receipts and shares. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in convertible fixed income and preferred securities and/or take short positions and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit.

The Portfolio may invest in ETFs and similar products, which generally pursue a passive index-based strategy.

In addition, the Portfolio may, but is not required to (1) enter into futures and forward currency contracts and equity, interest rate, credit default and currency swap agreements; and (2) write put and call options on securities (including ETFs), indexes and currencies, in each case for hedging purposes or to seek to increase returns.

It is expected that the Portfolio will buy and sell securities, and take short positions in securities, frequently in connection with implementing its investment strategy.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

Convertible Securities Risk. The market value of convertible securities may perform like that of non-convertible fixed income securities; that is, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). In addition, convertible securities are subject to the risk that the issuer will not make interest or principal payments, or will not make payments on a timely basis. Since it derives a portion of its value from the common stock into which it may be converted, a convertible security also is subject to the same types of market and issuer risks that apply to the underlying common stock.

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 interest rates in the US and other countries are at or near historic lows.

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 fixed income securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds 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).

Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although such securities will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

Preferred Securities Risk. There are various risks associated with investing in preferred securities. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, or redeem, its issue at par earlier than the scheduled maturity. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs), indexes and currencies 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, interest rate, index, commodity, currency or other reference asset. 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 when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent on counterparties to its securities borrowing transactions in connection with short sales of securities and counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in a loss of Portfolio assets used as collateral or the loss of monies owed to the Portfolio by a counterparty.

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.

Leverage Risk. The use of leverage, which the Portfolio’s strategy entails, may magnify the Portfolio’s gains or losses.

Value Investing Risk. The Portfolio invests 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 securities in which the Portfolio invests may respond differently to market and other developments than other types of securities.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Market Direction Risk. Since the Portfolio will typically hold both long and short positions, an investment in the Portfolio will involve market risks associated with different types of investment decisions than those made for a typical “long only” fund. The Portfolio’s results will suffer both when there is a general market advance and the Portfolio holds significant “short” positions, or when there is a general market decline and the Portfolio holds significant “long” positions. In recent years, the markets have shown considerable volatility from day to day and even in intra-day trading.

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.

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.

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 Investment Manager does not intend to actively hedge the Portfolio’s foreign currency exposure.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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.

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.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 Enhanced Opportunities 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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 Enhanced Opportunities 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.LazardNet.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]

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Best Quarter:
9/30/16 2.33%

Worst Quarter:
12/31/15 -1.64%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2016

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

2.33%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2015

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(1.64%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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

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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, 2016) 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 Enhanced Opportunities Portfolio | BofA Merrill Lynch U.S. Convertible ex Mandatory Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.71%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.23%

Lazard Enhanced Opportunities Portfolio | HFRX Global Hedge Fund Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.62%)

Lazard Enhanced Opportunities Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.30%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

0.09%

^[2]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

2.11%

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

2.20%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

3.55%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.81%

^[4]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.74%

^[5]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 177

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

941

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,726

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,782

Annual Return 2015

rr_AnnualReturn2015

(2.32%)

Annual Return 2016

rr_AnnualReturn2016

4.50%

1 Year

rr_AverageAnnualReturnYear01

4.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.03%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2014

Lazard Enhanced Opportunities Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.87%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.23%)

Lazard Enhanced Opportunities Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

2.55%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.25%)

Lazard Enhanced Opportunities Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.30%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

0.12%

^[2]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

13.69%

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

13.81%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

15.41%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

13.39%

^[4]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

2.02%

^[5]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 205

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

3,091

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

5,396

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 9,328

1 Year

rr_AverageAnnualReturnYear01

4.13%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.72%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2014

Lazard Enhanced Opportunities Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.30%

^[1]

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

0.09%

^[2],[6]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

2.11%

^[6]

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[3]

Total Other Expenses

rr_OtherExpensesOverAssets

2.20%

^[6]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.05%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

3.55%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.86%

^[4]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.69%

^[5]

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares for the last fiscal year.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 172

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

936

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,721

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 3,779

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

4.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.03%

[1] Restated to reflect current management fee.

[2] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[3] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[4] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018 to the extent Total Annual Portfolio Operating Expenses exceed 1.60%, 1.85% and 1.55% 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, dividend and interest expenses on securities sold short, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[5] Excluding Dividend Expenses on Securities Sold Short and Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.60%, 1.85% and 1.55% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[6] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares for the last fiscal year.

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Lazard Fundamental Long/Short Portfolio

Lazard Fundamental Long/Short Portfolio

Investment Objective

The Portfolio seeks capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Fundamental Long/Short Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.40%	1.40%	1.40%
Distribution and Service (12b-1) Fees		none	0.25%	none
Dividend Expenses on Securities Sold Short	[1]	0.99%	0.98%	0.99%	[2]
Borrowing Expenses on Securities Sold Short	[3]	0.59%	0.59%	0.59%	[2]
Remainder of Other Expenses		0.17%	0.20%	0.17%	[2]
Total Other Expenses		1.75%	1.77%	1.75%	[2]
Acquired Fund Fees and Expenses (Underlying Funds)		0.08%	0.08%	0.08%
Total Annual Portfolio Operating Expenses	[4]	3.23%	3.50%	3.23%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Fundamental Long/Short Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	326	995	1,688	3,531
Open Shares	353	1,074	1,817	3,774
R6 Shares	326	995	1,688	3,531

Portfolio Turnover

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. For the last fiscal year, the Portfolio’s portfolio turnover rate was 257% of the average value of its portfolio (excluding securities sold short).

Principal Investment Strategies

The Portfolio utilizes a long/short investment strategy through investments in equity securities, principally common stocks, and derivative instruments that provide exposure to such equity securities. The Investment Manager’s approach in managing the Portfolio is based on its bottom-up relative-value philosophy. Generally, the Investment Manager seeks to take long positions by investing in equity securities of companies with strong and/or improving financial productivity that have attractive valuations, and seeks to complement these long positions with short positions in respect of companies viewed by the Investment Manager to possess deteriorating fundamentals, unattractive valuations or other qualities warranting a short position, or those that represent a sector or market hedge. The Portfolio will generally have short positions through selling securities “short” and through investments in derivative instruments, principally swap agreements on individual securities, and may use short positions to seek to increase returns or to reduce risk. The total gross exposure of the Portfolio will typically range from 0% to 200% of the Portfolio’s NAV and that the net exposure will typically range from -25% (net short position) to 100% of its NAV. As an example, if the Portfolio’s long investment exposure is 100% of its NAV and its short exposure is 75% of its NAV, the Portfolio would have a net long exposure of 25% of NAV.

Although the Portfolio’s investment focus is US companies, the Portfolio also may invest in non-US companies, including depositary receipts and shares. The Portfolio may invest in companies across the capitalization spectrum and also may invest in IPOs. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in equity securities and/or take short positions in equity securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit.

A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

In addition, the Portfolio may, but is not required to, invest in ETFs, enter into equity and currency swap agreements, and forward currency contracts; and purchase and sell options, including writing put and call options on securities (including ETFs), indexes and currencies, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs), indexes and currencies 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 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, commodity, interest rate, currency or other reference asset. 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 when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent on counterparties to its securities borrowing transactions in connection with short sales of securities and counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in a loss of Portfolio assets used as collateral or the loss of monies owed to the Portfolio by a counterparty.

Leverage Risk. The use of leverage, which the Portfolio’s strategy entails, may magnify the Portfolio’s gains or losses.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Market Direction Risk. Since the Portfolio will typically hold both long and short positions, an investment in the Portfolio will involve market risks associated with different types of investment decisions than those made for a typical “long only” fund. The Portfolio’s results will suffer both when there is a general market advance and the Portfolio holds significant “short” positions, or when there is a general market decline and the Portfolio holds significant “long” positions. In recent years, the markets have shown considerable volatility from day to day and even in intra-day trading.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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 countries can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries.

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 Investment Manager does not intend to actively hedge the Portfolio’s foreign currency exposure.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Fundamental Long/Short 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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.

Best Quarter:
12/31/14 11.47%

Worst Quarter:
3/31/16 -4.63%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

Average Annual Returns - Lazard Fundamental Long/Short Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	(7.99%)	4.08%	Apr. 30, 2014
Open Shares	(8.28%)	3.80%	Apr. 30, 2014
R6 Shares	(7.99%)	4.08%
After Taxes on Distributions | Institutional Shares	(7.99%)	3.81%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	(4.52%)	3.03%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)	11.96%	9.00%
HFRX Equity Hedge Index (reflects no deduction for fees, expenses or taxes)	0.10%	(0.25%)

[1] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[2] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

[3] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[4] Excluding Dividend and Borrowing Expenses on Securities Sold Short and Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses are 1.57%, 1.85% and 1.57% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

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Value

Lazard Fundamental Long/Short Portfolio

Risk/Return:

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Risk/Return [Heading]

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Lazard Fundamental Long/Short Portfolio

Objective [Heading]

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Investment Objective

Objective, Primary [Text Block]

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The Portfolio seeks capital appreciation.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional 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]

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Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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. For the last fiscal year, the Portfolio’s portfolio turnover rate was 257% of the average value of its portfolio (excluding securities sold short).

Portfolio Turnover, Rate

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257.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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The Portfolio utilizes a long/short investment strategy through investments in equity securities, principally common stocks, and derivative instruments that provide exposure to such equity securities. The Investment Manager’s approach in managing the Portfolio is based on its bottom-up relative-value philosophy. Generally, the Investment Manager seeks to take long positions by investing in equity securities of companies with strong and/or improving financial productivity that have attractive valuations, and seeks to complement these long positions with short positions in respect of companies viewed by the Investment Manager to possess deteriorating fundamentals, unattractive valuations or other qualities warranting a short position, or those that represent a sector or market hedge. The Portfolio will generally have short positions through selling securities “short” and through investments in derivative instruments, principally swap agreements on individual securities, and may use short positions to seek to increase returns or to reduce risk. The total gross exposure of the Portfolio will typically range from 0% to 200% of the Portfolio’s NAV and that the net exposure will typically range from -25% (net short position) to 100% of its NAV. As an example, if the Portfolio’s long investment exposure is 100% of its NAV and its short exposure is 75% of its NAV, the Portfolio would have a net long exposure of 25% of NAV.

Although the Portfolio’s investment focus is US companies, the Portfolio also may invest in non-US companies, including depositary receipts and shares. The Portfolio may invest in companies across the capitalization spectrum and also may invest in IPOs. At certain times, based on the currently existing market environment, the Investment Manager may not believe it is able to find sufficient opportunities to invest in equity securities and/or take short positions in equity securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit.

A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

In addition, the Portfolio may, but is not required to, invest in ETFs, enter into equity and currency swap agreements, and forward currency contracts; and purchase and sell options, including writing put and call options on securities (including ETFs), indexes and currencies, for hedging purposes or to seek to increase returns.

The Portfolio is classified as “non-diversified” under the 1940 Act, which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs), indexes and currencies 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 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, commodity, interest rate, currency or other reference asset. 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 when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Counterparty Credit Risk. The Portfolio’s investment strategy is dependent on counterparties to its securities borrowing transactions in connection with short sales of securities and counterparties to derivatives transactions. Transactions with such counterparties are subject to the risk of default by a counterparty, which could result in a loss of Portfolio assets used as collateral or the loss of monies owed to the Portfolio by a counterparty.

Leverage Risk. The use of leverage, which the Portfolio’s strategy entails, may magnify the Portfolio’s gains or losses.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Market Direction Risk. Since the Portfolio will typically hold both long and short positions, an investment in the Portfolio will involve market risks associated with different types of investment decisions than those made for a typical “long only” fund. The Portfolio’s results will suffer both when there is a general market advance and the Portfolio holds significant “short” positions, or when there is a general market decline and the Portfolio holds significant “long” positions. In recent years, the markets have shown considerable volatility from day to day and even in intra-day trading.

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.

Value Investing Risk. The Portfolio invests in stocks 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 stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Large Cap Companies Risk. Investments in large cap companies may underperform other segments of the market when such other segments are in favor or because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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.

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 countries can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries.

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 Investment Manager does not intend to actively hedge the Portfolio’s foreign currency exposure.

Non-Diversification Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

IPO Shares Risk. The prices of securities purchased in IPOs can be very volatile. The effect of IPOs on the Portfolio’s performance depends on a variety of factors, including the number of IPOs the Portfolio invests in relative to the size of the Portfolio and whether and to what extent a security purchased in an IPO appreciates or depreciates in value. As the Portfolio’s asset base increases, IPOs may have a diminished effect on the Portfolio’s performance.

ETF Risk. Shares of ETFs may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV. 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 1940 Act in the amount of its assets that may be invested in ETFs and unless an ETF has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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]

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

Risk Nondiversified Status [Text]

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The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Bar Chart and Performance Table [Heading]

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Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Fundamental Long/Short 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 Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.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]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Fundamental Long/Short 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]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
12/31/14 11.47%

Worst Quarter:
3/31/16 -4.63%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Dec. 31, 2014

Highest Quarterly Return

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11.47%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Mar. 31, 2016

Lowest Quarterly Return

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(4.63%)

Performance Table Heading

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Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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]

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After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.

Performance Table Narrative

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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, 2016) 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 Fundamental Long/Short Portfolio | S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

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1 Year

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11.96%

Life of Portfolio

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9.00%

Lazard Fundamental Long/Short Portfolio | HFRX Equity Hedge Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

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1 Year

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0.10%

Life of Portfolio

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(0.25%)

Lazard Fundamental Long/Short Portfolio | Institutional Shares

Risk/Return:

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Management Fees

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1.40%

Distribution and Service (12b-1) Fees

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none

Dividend Expenses on Securities Sold Short

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0.99%

^[1]

Remainder of Other Expenses

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0.17%

Borrowing Expenses on Securities Sold Short

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0.59%

^[2]

Total Other Expenses

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1.75%

Acquired Fund Fees and Expenses (Underlying Funds)

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0.08%

Total Annual Portfolio Operating Expenses

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3.23%

^[3]

Expense Example, with Redemption, 1 Year

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$ 326

Expense Example, with Redemption, 3 Years

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995

Expense Example, with Redemption, 5 Years

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1,688

Expense Example, with Redemption, 10 Years

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$ 3,531

Annual Return 2015

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5.97%

Annual Return 2016

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(7.99%)

1 Year

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(7.99%)

Life of Portfolio

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4.08%

Inception Date

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Apr. 30, 2014

Lazard Fundamental Long/Short Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

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1 Year

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(7.99%)

Life of Portfolio

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3.81%

Lazard Fundamental Long/Short Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

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1 Year

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(4.52%)

Life of Portfolio

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3.03%

Lazard Fundamental Long/Short Portfolio | Open Shares

Risk/Return:

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Management Fees

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1.40%

Distribution and Service (12b-1) Fees

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0.25%

Dividend Expenses on Securities Sold Short

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0.98%

^[1]

Remainder of Other Expenses

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0.20%

Borrowing Expenses on Securities Sold Short

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0.59%

^[2]

Total Other Expenses

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1.77%

Acquired Fund Fees and Expenses (Underlying Funds)

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0.08%

Total Annual Portfolio Operating Expenses

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3.50%

^[3]

Expense Example, with Redemption, 1 Year

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$ 353

Expense Example, with Redemption, 3 Years

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1,074

Expense Example, with Redemption, 5 Years

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1,817

Expense Example, with Redemption, 10 Years

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$ 3,774

1 Year

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(8.28%)

Life of Portfolio

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3.80%

Inception Date

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Apr. 30, 2014

Lazard Fundamental Long/Short Portfolio | R6 Shares

Risk/Return:

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Management Fees

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1.40%

Distribution and Service (12b-1) Fees

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none

Dividend Expenses on Securities Sold Short

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0.99%

^[1],[4]

Remainder of Other Expenses

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0.17%

^[4]

Borrowing Expenses on Securities Sold Short

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0.59%

^[2],[4]

Total Other Expenses

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1.75%

^[4]

Acquired Fund Fees and Expenses (Underlying Funds)

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0.08%

Total Annual Portfolio Operating Expenses

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3.23%

^[3]

Other Expenses, New Fund, Based on Estimates [Text]

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Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

Expense Example, with Redemption, 1 Year

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$ 326

Expense Example, with Redemption, 3 Years

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995

Expense Example, with Redemption, 5 Years

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1,688

Expense Example, with Redemption, 10 Years

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$ 3,531

Performance One Year or Less [Text]

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Returns shown below for the Portfolio’s R6 Shares (which were not operational as of December 31, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

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(7.99%)

Life of Portfolio

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4.08%

[1] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[2] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[3] Excluding Dividend and Borrowing Expenses on Securities Sold Short and Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses are 1.57%, 1.85% and 1.57% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[4] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

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Lazard Capital Allocator Opportunistic Strategies Portfolio

Lazard Capital Allocator Opportunistic Strategies Portfolio

Investment Objective

The Portfolio seeks long-term capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. Investors transacting in Institutional shares through a financial intermediary acting as a broker in an agency capacity may be required to pay a commission directly to the broker.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Capital Allocator Opportunistic Strategies Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		1.00%	1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%	none
Dividend Expenses on Securities Sold Short	[1]				[2]
Borrowing Expenses on Securities Sold Short	[3]				[2]
Remainder of Other Expenses		0.19%	2.06%	0.19%	[2]
Total Other Expenses		0.19%	2.06%	0.19%	[2]
Acquired Fund Fees and Expenses (Underlying Funds)		0.69%	0.69%	0.69%	[2]
Total Annual Portfolio Operating Expenses		1.88%	4.00%	1.88%
Fee Waiver and Expense Reimbursement	[4]	0.17%	1.99%	0.17%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[5]	1.71%	2.01%	1.71%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Capital Allocator Opportunistic Strategies Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	174	574	1,000	2,187
Open Shares	204	1,036	1,885	4,083
R6 Shares	174	574	1,000	2,187

Portfolio Turnover

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 238% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio utilizes an asset allocation strategy to invest in a global portfolio of uncorrelated assets that can include exposure, through underlying vehicles, to stocks, bonds, commodities and other investments.

The Portfolio invests primarily in exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs), as well as actively managed closed-end management investment companies (“closed-end funds”) and exchange-traded notes (“ETNs” and collectively with ETFs and closed-end funds, “Underlying Funds”). ETFs and ETNs in which the Portfolio may invest include both ETFs and ETNs designed to correlate directly with an index and ETFs and ETNs designed to correlate inversely with an index and may include actively-managed ETFs. The Portfolio, through Underlying Funds in which it invests, may invest in non-US companies (including those in emerging markets), and the Portfolio also may invest directly in equity and debt securities in addition to its investments in Underlying Funds. The Portfolio’s investment portfolio is concentrated in a relatively small number of holdings (generally 10 to 30). Investors can invest directly in Underlying Funds and do not need to invest in Underlying Funds through mutual funds or separately managed accounts.

The Portfolio may, but is not required to (1) enter into equity, total return and currency swap agreements; futures contracts and options on futures contracts (including with respect to index and commodities); and forward currency contracts; and (2) write put and covered call options on securities (including ETFs and ETNs), indexes and currencies, in each case for hedging purposes or to seek to increase returns, including as a substitute for purchasing an Underlying Fund.

The Portfolio may, but is not required to, effect short sales of securities. A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified, investment portfolios.

Principal Investment Risks

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

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Underlying Funds Risk. Shares of ETFs and closed-end funds in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs and closed-end funds may trade at prices at, below or above their most recent NAV. Shares of closed-end funds, in particular, frequently trade at persistent discounts to their NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in Underlying Funds are subject to the risks of Underlying Funds’ investments, as well as to the general risks of investing in Underlying Funds. 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 and closed-end funds in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs and closed-end funds, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

The Portfolio may be limited by the 1940 Act in the amount of its assets that may be invested in ETFs and closed-end funds unless an ETF or a closed-end fund has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. The securities markets of emerging market countries have historically been extremely volatile. 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. 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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 interest rates in the US and other countries are at or near historic lows.

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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs and ETNs), indexes and currencies 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 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 index, commodity, interest rate, currency, security or other reference asset. 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 when 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.

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Capital Allocator Opportunistic Strategies 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.LazardNet.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.

Best Quarter:
6/30/09 14.66%

Worst Quarter:
9/30/11 -10.44%

Average Annual Total Returns (for the periods ended December 31, 2016)

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, 2016) 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.

The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Bloomberg Barclays US Aggregate Index.

Average Annual Returns - Lazard Capital Allocator Opportunistic Strategies Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	5.36%	5.32%	3.30%	Mar. 26, 2008
Open Shares	5.08%	4.91%	2.98%	Mar. 31, 2008
R6 Shares	5.36%	5.32%	3.30%
After Taxes on Distributions | Institutional Shares	4.84%	3.86%	2.20%
After Taxes on Distributions and Sale of Fund Shares | Institutional Shares	3.18%	3.65%	2.24%
MSCI World Index (reflects no deduction for fees, expenses or taxes) (Institutional)	7.51%	10.41%	4.42%
MSCI World Index (reflects no deduction for fees, expenses or taxes) (Open)	7.51%	10.41%	4.48%
Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Institutional)	5.61%	7.21%	4.71%
Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Open)	5.61%	7.21%	4.74%

[1] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[2] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

[3] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[4] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.02%, 1.32% and 1.02% 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, dividend and interest expenses on securities sold short, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[5] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.02%, 1.32% and 1.02% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

Lazard Capital Allocator Opportunistic Strategies Portfolio

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Capital Allocator Opportunistic Strategies Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

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. Investors transacting in Institutional 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, 2018

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 238% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

238.00%

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 fee waiver and expense reimbursement arrangement 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 Portfolio utilizes an asset allocation strategy to invest in a global portfolio of uncorrelated assets that can include exposure, through underlying vehicles, to stocks, bonds, commodities and other investments.

The Portfolio invests primarily in exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs), as well as actively managed closed-end management investment companies (“closed-end funds”) and exchange-traded notes (“ETNs” and collectively with ETFs and closed-end funds, “Underlying Funds”). ETFs and ETNs in which the Portfolio may invest include both ETFs and ETNs designed to correlate directly with an index and ETFs and ETNs designed to correlate inversely with an index and may include actively-managed ETFs. The Portfolio, through Underlying Funds in which it invests, may invest in non-US companies (including those in emerging markets), and the Portfolio also may invest directly in equity and debt securities in addition to its investments in Underlying Funds. The Portfolio’s investment portfolio is concentrated in a relatively small number of holdings (generally 10 to 30). Investors can invest directly in Underlying Funds and do not need to invest in Underlying Funds through mutual funds or separately managed accounts.

The Portfolio may, but is not required to (1) enter into equity, total return and currency swap agreements; futures contracts and options on futures contracts (including with respect to index and commodities); and forward currency contracts; and (2) write put and covered call options on securities (including ETFs and ETNs), indexes and currencies, in each case for hedging purposes or to seek to increase returns, including as a substitute for purchasing an Underlying Fund.

The Portfolio may, but is not required to, effect short sales of securities. A short sale involves the sale of a security that the Portfolio does not own in the expectation of purchasing the same security (or a security exchangeable therefor) at a later date and at a lower price and profiting from the price decline. Similarly, when taking short positions with respect to securities through investments in derivative instruments, the Investment Manager is expecting the value of such securities to fall during the period of the Portfolio’s investment exposure.

Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified, investment portfolios.

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.

Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the 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.

Underlying Funds Risk. Shares of ETFs and closed-end funds in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs and closed-end funds may trade at prices at, below or above their most recent NAV. Shares of closed-end funds, in particular, frequently trade at persistent discounts to their NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in Underlying Funds are subject to the risks of Underlying Funds’ investments, as well as to the general risks of investing in Underlying Funds. 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 and closed-end funds in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs and closed-end funds, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

The Portfolio may be limited by the 1940 Act in the amount of its assets that may be invested in ETFs and closed-end funds unless an ETF or a closed-end fund has received an exemptive order from the SEC on which the Portfolio may rely or an exemption is available.

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 can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. The securities markets of emerging market countries have historically been extremely volatile. 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. 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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 interest rates in the US and other countries are at or near historic lows.

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.

Focused Investing Risk. The Portfolio’s NAV may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

Short Position Risk. Short positions may involve substantial risks. If a short position appreciates in value during the period of the Portfolio’s investment, there will be a loss to the Portfolio that could be substantial. Short positions involve more risk than long positions because the maximum sustainable loss on a security purchased is limited to the amount paid for the security plus the transaction costs. However, the Portfolio’s potential loss on a short position is unlimited because, theoretically, there is no limit to the potential price increase of a security.

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. Over-the-counter swap agreements, forward currency contracts, over-the-counter options on securities (including options on ETFs and ETNs), indexes and currencies 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 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 index, commodity, interest rate, currency, security or other reference asset. 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 when 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.

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 Capital Allocator Opportunistic Strategies 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.LazardNet.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 Capital Allocator Opportunistic Strategies 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Bloomberg Barclays US Aggregate Index.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.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:
6/30/09 14.66%

Worst Quarter:
9/30/11 -10.44%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.66%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.44%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the periods ended December 31, 2016)

Index No Deduction for Fees, Expenses, Taxes [Text]

rr_IndexNoDeductionForFeesExpensesTaxes

(reflects no deduction for fees, expenses 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, 2016) 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.

The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Bloomberg Barclays US Aggregate Index.

Lazard Capital Allocator Opportunistic Strategies Portfolio | MSCI World Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.51%

5 Years

rr_AverageAnnualReturnYear05

10.41%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.42%

Lazard Capital Allocator Opportunistic Strategies Portfolio | MSCI World Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

7.51%

5 Years

rr_AverageAnnualReturnYear05

10.41%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.48%

Lazard Capital Allocator Opportunistic Strategies Portfolio | Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.61%

5 Years

rr_AverageAnnualReturnYear05

7.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.71%

Lazard Capital Allocator Opportunistic Strategies Portfolio | Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.61%

5 Years

rr_AverageAnnualReturnYear05

7.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.74%

Lazard Capital Allocator Opportunistic Strategies Portfolio | Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

^[1]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

0.19%

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[2]

Total Other Expenses

rr_OtherExpensesOverAssets

0.19%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.69%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.88%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.17%

^[3]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.71%

^[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 174

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

574

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,000

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,187

Annual Return 2009

rr_AnnualReturn2009

21.21%

Annual Return 2010

rr_AnnualReturn2010

14.58%

Annual Return 2011

rr_AnnualReturn2011

(3.28%)

Annual Return 2012

rr_AnnualReturn2012

9.16%

Annual Return 2013

rr_AnnualReturn2013

12.22%

Annual Return 2014

rr_AnnualReturn2014

4.40%

Annual Return 2015

rr_AnnualReturn2015

(3.80%)

Annual Return 2016

rr_AnnualReturn2016

5.36%

1 Year

rr_AverageAnnualReturnYear01

5.36%

5 Years

rr_AverageAnnualReturnYear05

5.32%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.30%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 26, 2008

Lazard Capital Allocator Opportunistic Strategies Portfolio | Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

4.84%

5 Years

rr_AverageAnnualReturnYear05

3.86%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.20%

Lazard Capital Allocator Opportunistic Strategies Portfolio | Institutional Shares | After Taxes on Distributions and Sale of Fund Shares

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.18%

5 Years

rr_AverageAnnualReturnYear05

3.65%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.24%

Lazard Capital Allocator Opportunistic Strategies Portfolio | Open Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

^[1]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

2.06%

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[2]

Total Other Expenses

rr_OtherExpensesOverAssets

2.06%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.69%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

4.00%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.99%

^[3]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

2.01%

^[4]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 204

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,036

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,885

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 4,083

1 Year

rr_AverageAnnualReturnYear01

5.08%

5 Years

rr_AverageAnnualReturnYear05

4.91%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.98%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2008

Lazard Capital Allocator Opportunistic Strategies Portfolio | R6 Shares

Risk/Return:

rr_RiskReturnAbstract

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Dividend Expenses on Securities Sold Short

rr_Component1OtherExpensesOverAssets

^[1],[5]

Remainder of Other Expenses

rr_Component2OtherExpensesOverAssets

0.19%

^[5]

Borrowing Expenses on Securities Sold Short

rr_Component3OtherExpensesOverAssets

^[2],[5]

Total Other Expenses

rr_OtherExpensesOverAssets

0.19%

^[5]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.69%

^[5]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.88%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

0.17%

^[3]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.71%

^[4]

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 174

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

574

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,000

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,187

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, 2016) reflect the performance of the Portfolio’s Institutional Shares.

1 Year

rr_AverageAnnualReturnYear01

5.36%

5 Years

rr_AverageAnnualReturnYear05

5.32%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.30%

[1] When there is a cash dividend declared on a security the Portfolio has borrowed to sell short, the Portfolio pays the lender an amount equal to the dividend and this payment is recorded as an expense.

[2] Net borrowing expenses on securities sold short, in which the Portfolio may receive income or be charged a fee on the borrowed securities.

[3] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1 2018, to the extent Total Annual Portfolio Operating Expenses exceed 1.02%, 1.32% and 1.02% 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, dividend and interest expenses on securities sold short, fees and expenses of "Acquired Funds" and extraordinary expenses. This agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[4] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are 1.02%, 1.32% and 1.02% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[5] Based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

XML

Lazard Global Dynamic Multi-Asset Portfolio

Lazard Global Dynamic Multi-Asset Portfolio

Investment Objective

The Portfolio seeks total return.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 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.

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses - Lazard Global Dynamic Multi-Asset Portfolio		Institutional Shares	Open Shares	R6 Shares
Management Fees		0.80%	0.80%	0.80%
Distribution and Service (12b-1) Fees		none	0.25%	none
Other Expenses		1.34%	8.29%	1.34%	[1]
Acquired Fund Fees and Expenses (Underlying Funds)		0.01%	0.01%	0.01%
Total Annual Portfolio Operating Expenses		2.15%	9.35%	2.15%
Fee Waiver and Expense Reimbursement	[2]	1.24%	8.14%	1.24%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[3]	0.91%	1.21%	0.91%

Example

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 fee waiver and expense reimbursement arrangement in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example - Lazard Global Dynamic Multi-Asset Portfolio - USD ($)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	93	553	1,040	2,385
Open Shares	123	1,981	3,680	7,322
R6 Shares	93	553	1,040	2,385

Portfolio Turnover

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 period from May 27, 2016 (commencement of operations) through December 31, 2016, the Portfolio’s portfolio turnover rate was 67% of the average value of its portfolio.

Principal Investment Strategies

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 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 or lower than BBB by S&P) (“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.

Principal Investment Risks

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 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 the 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 may invest a portion of its assets in stocks 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 may invest a portion of its assets in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio depends upon effectiveness of the Investment Manager’s quantitative model. 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, the 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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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 interest rates in the US and other countries are at or near historic lows.

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 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 derivative transactions.

ETF Risk. Any investments in ETFs are subject to the risks of the investments of the ETFs, 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 any ETFs in which the Portfolio invests. Shares of ETFs in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV.

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 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 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. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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.

Performance Bar Chart and Table

Because the Portfolio did not have a full calendar year of performance prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with that of a broad measure of market performance. Updated performance information is available at www.LazardNet.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.

[1] "Other Expenses" are based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.20% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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.

[3] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .90%, 1.20% and .90% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

XML

Label

Element

Value

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. 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, 2018

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 period from May 27, 2016 (commencement of operations) through December 31, 2016, the Portfolio’s portfolio turnover rate was 67% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

67.00%

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 fee waiver and expense reimbursement arrangement 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 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 or lower than BBB by S&P) (“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 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 the 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 may invest a portion of its assets in stocks 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 may invest a portion of its assets in stocks 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 stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Quantitative Model Risk. The success of the Portfolio depends upon effectiveness of the Investment Manager’s quantitative model. 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, the 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 can 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. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

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 interest rates in the US and other countries are at or near historic lows.

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 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 derivative transactions.

ETF Risk. Any investments in ETFs are subject to the risks of the investments of the ETFs, 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 any ETFs in which the Portfolio invests. Shares of ETFs in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV.

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 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 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. Derivatives transactions incur costs, either explicitly or implicitly, which reduce return. 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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Portfolio did not have a full calendar year of performance prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with that of a broad measure of market performance. Updated performance information is available at www.LazardNet.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.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.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.

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

1.34%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.15%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.91%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 93

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

553

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,040

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,385

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

8.29%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

9.35%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

8.14%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.21%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 123

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,981

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

3,680

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 7,322

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

1.34%

^[3]

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.01%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.15%

Fee Waiver and Expense Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

1.24%

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.91%

^[2]

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

“Other Expenses” are based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 93

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

553

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,040

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

$ 2,385

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio until May 1, 2018, to the extent Total Annual Portfolio Operating Expenses exceed .90%, 1.20% 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 agreement can only be amended by agreement of the Fund, upon approval by the Board, 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] Excluding Acquired Fund Fees and Expenses, the Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement are .90%, 1.20% and .90% of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively.

[3] "Other Expenses" are based on estimated amounts for the current fiscal year, using amounts for Institutional Shares from the last fiscal year.

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	May 01, 2017