v3.26.1
Label Element Value
Prospectus Summary | Small-Cap Value Series  
Risk/Return: oef_RiskReturnAbstract  
Risk/Return [Heading] oef_RiskReturnHeading Small Cap Value Fund
Objective [Heading] oef_ObjectiveHeading INVESTMENT OBJECTIVE
Objective, Primary [Text Block] oef_ObjectivePrimaryTextBlock The Fund’s investment objective is long-term capital appreciation.
Expense Heading [Optional Text] oef_ExpenseHeading FEES AND EXPENSES
Expense Narrative [Text Block] oef_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you and certain members of your family invest, or agree to invest in the future, at least $50,000 in the Lord Abbett Family of Funds. More information about these and other discounts is available from your financial intermediary and in “Sales Charge Reductions and Waivers” on page 61 of the prospectus, Appendix A to the prospectus, titled “Intermediary-Specific Sales Charge Reductions and Waivers,” and “Purchases, Redemptions, Pricing, and Payments to Dealers” on page 9-1 of Part II of the statement of additional information (“SAI”).
Shareholder Fees Caption [Optional Text] oef_ShareholderFeesCaption Shareholder Fees (Fees paid directly from your investment)
Operating Expenses Caption [Optional Text] oef_OperatingExpensesCaption Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] oef_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] oef_PortfolioTurnoverTextBlock The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund

shares are held in a taxable account. These costs, which are not reflected in the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 69% of the average value of its portfolio.
Portfolio Turnover, Rate oef_PortfolioTurnoverRate 69.00%
Expense Breakpoint Discounts [Text] oef_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you and certain members of your family invest, or agree to invest in the future, at least $50,000 in the Lord Abbett Family of Funds.
Expense Breakpoint, Minimum Investment Required [Amount] oef_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example [Heading] oef_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] oef_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Class C shares automatically convert to Class A shares after eight years. The expense example for Class C shares for the ten-year period reflects the conversion to Class A shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] oef_ExpenseExampleByYearCaption If Shares Are Redeemed
Expense Example, No Redemption, By Year, Caption [Text] oef_ExpenseExampleNoRedemptionByYearCaption If Shares Are Not Redeemed
Strategy [Heading] oef_StrategyHeading PRINCIPAL INVESTMENT STRATEGIES
Strategy Narrative [Text Block] oef_StrategyNarrativeTextBlock

The Fund invests in equity securities of small companies that the portfolio management team believes are undervalued by the market and are selling at reasonable prices in relation to the portfolio management team’s assessment of their potential or intrinsic value. Under normal circumstances, the Fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in equity securities of small companies. A small company is defined as a company having a market capitalization at the time of purchase that falls within the market capitalization range of companies in the Russell 2000® Index.

Equity securities in which the Fund may invest include common stocks, preferred stocks, equity interests in trusts (including real estate investment trusts (“REITs”) and privately offered trusts), partnerships, joint ventures, limited liability companies and vehicles with similar legal structures, other instruments convertible or exercisable into the foregoing, and other investments with similar economic characteristics.

The Fund may invest up to 20% of its net assets in securities of foreign companies, including emerging market companies, American Depositary Receipts (“ADRs”), Global Depository Receipts (“GDRs”), and other similar depositary receipts. In addition to ADRs, the Fund generally defines foreign companies as those whose securities are traded primarily on non-U.S. securities exchanges.

The Fund may sell a security when the Fund believes the security is less likely to benefit from the current market and economic environment, or shows signs of deteriorating fundamentals, among other reasons. The Fund may deviate from the investment strategy described above for temporary defensive purposes. The Fund may miss certain investment opportunities if defensive strategies are used and thus may not achieve its investment objective.

Bar Chart and Performance Table [Heading] oef_BarChartAndPerformanceTableHeading PERFORMANCE
Performance Narrative [Text Block] oef_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund’s returns. Each assumes reinvestment of dividends and distributions. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Performance Information Illustrates Variability of Returns [Text] oef_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund’s returns.
Performance Availability Phone [Text] oef_PerformanceAvailabilityPhone 888-522-2388
Performance Availability Website Address [Text] oef_PerformanceAvailabilityWebSiteAddress www.lordabbett.com
Performance Past Does Not Indicate Future [Text] oef_PerformancePastDoesNotIndicateFuture The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] oef_BarChartHeading Bar Chart (per calendar year) - Class A Shares
Bar Chart Narrative [Text Block] oef_BarChartNarrativeTextBlock

The bar chart shows changes in the performance of the Fund’s Class A shares from calendar year to calendar year. This chart does not reflect the sales charge applicable to Class A shares. If the sales charge were reflected, returns would be lower.

Performance for the Fund’s other share classes will vary due to the different expenses each class bears. Updated performance information is available at www.lordabbett.com or by calling 888-522-2388.
Bar Chart Does Not Reflect Sales Loads [Text] oef_BarChartDoesNotReflectSalesLoads This chart does not reflect the sales charge applicable to Class A shares. If the sales charge were reflected, returns would be lower.
Bar Chart Closing [Text Block] oef_BarChartClosingTextBlock

Best Quarter 4th Q 2020 +29.79%    Worst Quarter 1st Q 2020 -37.69%
Performance Table Heading oef_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2025)
Performance Table Does Reflect Sales Loads oef_PerformanceTableDoesReflectSalesLoads The Fund’s average annual total returns include applicable sales charges.
Index No Deduction for Fees, Expenses, or Taxes [Text] oef_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses, or taxes)
Performance Table Uses Highest Federal Rate oef_PerformanceTableUsesHighestFederalRate The after-tax returns of Class A shares included in the table below are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred oef_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements such as 401(k) plans or Individual Retirement Accounts (“IRAs”).
Performance Table One Class of after Tax Shown [Text] oef_PerformanceTableOneClassOfAfterTaxShown After-tax returns for other share classes are not shown in the table and will vary from those shown for Class A shares.
Performance Table Explanation after Tax Higher oef_PerformanceTableExplanationAfterTaxHigher In some cases, the return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to a tax benefit resulting from realized losses on a sale of Fund shares at the end of the period that is used to offset other gains.
Performance Table Narrative oef_PerformanceTableNarrativeTextBlock

The table below shows how the Fund’s average annual total returns compare to the returns of a securities market index with investment characteristics similar to those of the Fund as well as to a broad-based securities market index.1 The Fund’s average annual total returns include applicable sales charges.

The after-tax returns of Class A shares included in the table below are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. In some cases, the return after taxes on distributions and sale of Fund shares may exceed the return before taxes due to a tax benefit resulting from realized losses on a sale of Fund shares at the end of the period that is used to offset other gains. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements such as 401(k) plans or Individual Retirement Accounts (“IRAs”). After-tax returns for other share classes are not shown in the table and will vary from those shown for Class A shares.

1The Fund has adopted the S&P 500® Index as its broad-based securities market index.
Prospectus Summary | Small-Cap Value Series | PRINCIPAL RISKS  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

PRINCIPAL RISKS

As with any investment in a mutual fund, investing in the Fund involves risk, including the risk that you may receive little or no return on your investment. When you redeem your shares, they may be worth more or less than what you paid for them, which means that you may lose a portion or all of the money you invested in the Fund. The principal risks of investing in the Fund, which could adversely affect its performance, include:
Prospectus Summary | Small-Cap Value Series | Risk Lose Money [Member]  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock As with any investment in a mutual fund, investing in the Fund involves risk, including the risk that you may receive little or no return on your investment. When you redeem your shares, they may be worth more or less than what you paid for them, which means that you may lose a portion or all of the money you invested in the Fund.
Prospectus Summary | Small-Cap Value Series | Risk Not Insured [Member]  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock An investment in the Fund is not a deposit of any bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.
Prospectus Summary | Small-Cap Value Series | · Portfolio Management Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Portfolio Management Risk: If the strategies used and investments selected by the Fund’s portfolio management team fail to produce the intended result, the Fund may suffer losses or underperform other funds with the same investment objective or strategies, even in a favorable market.
Prospectus Summary | Small-Cap Value Series | · Market Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Market Risk: The market values of securities will fluctuate, sometimes sharply and unpredictably, based on overall economic conditions, governmental actions or intervention, market disruptions caused by trade disputes, tariffs or other factors, political developments, and other factors. Prices of equity securities tend to rise and fall more dramatically than those of debt securities.
Prospectus Summary | Small-Cap Value Series | · Equity Securities Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Equity Securities Risk: Equity securities, as well as equity-like securities such as convertible debt securities, may experience significant volatility. Such securities may fall sharply in response to adverse events affecting overall markets, a particular industry or sector, or an individual company’s financial condition.

Prospectus Summary | Small-Cap Value Series | · Industry and Sector Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Industry and Sector Risk: Although the Fund does not employ an industry or sector focus, its exposure to specific industries or sectors will increase from time to time based on the portfolio management team’s perception of investment opportunities. If the Fund is overweight in a single industry or sector relative to its benchmark index, the Fund will face an increased risk that the value of its portfolio will decrease because of events disproportionately affecting that industry or sector. Furthermore, investments in particular industries or sectors may be more volatile than the broader market as a whole.
Prospectus Summary | Small-Cap Value Series | · Small Company Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Small Company Risk: Investments in small companies may involve greater risks than investments in larger, more established companies. Securities of small companies tend to be more sensitive to changing economic, market, and industry conditions and tend to be more volatile and less liquid than equity securities of larger companies, especially over the short term.
Prospectus Summary | Small-Cap Value Series | · Value Investing Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Value Investing Risk: The prices of value stocks may lag the stock market for long periods of time if the market fails to recognize the company’s intrinsic worth. Value investing also is subject to the risk that a company judged to be undervalued may actually be appropriately priced or even overpriced.
Prospectus Summary | Small-Cap Value Series | · Foreign and Emerging Market Company Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Foreign and Emerging Market Company Risk: Investments in foreign companies and in U.S. companies with economic ties to foreign markets generally involve special risks. These companies may be more vulnerable to economic, political, and social instability and subject to less government supervision, lack of transparency, inadequate regulatory and accounting standards, and foreign taxes. Foreign company securities also include ADRs, which may be less liquid than the underlying shares in their primary trading market. Foreign securities also may subject the Fund’s investments to changes in currency exchange rates. Emerging market securities generally are more volatile than other foreign securities, and are subject to greater liquidity, regulatory, and political risks. Investments in emerging markets may be considered speculative and generally are riskier than investments in more developed markets. Emerging markets are more likely to experience hyperinflation and currency devaluations. Securities of emerging market companies may have far lower trading volumes and less liquidity than securities

of issuers in developed markets. In certain emerging market countries, governments participate to a significant degree in their respective economies. Action by these governments could have a significant adverse effect on market prices of securities and payment of dividends. Companies with economic ties to emerging markets may be susceptible to the same risks as companies organized in emerging markets.
Prospectus Summary | Small-Cap Value Series | · Foreign Currency Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Foreign Currency Risk: Investments in securities that are denominated or receiving revenues in foreign currencies are subject to the risk that those currencies will decline in value relative to the U.S. dollar, or, in the case of hedged positions, that the U.S. dollar will decline in value relative to the currency being hedged. Foreign currency exchange rates may fluctuate significantly over short periods of time.
Prospectus Summary | Small-Cap Value Series | · Real Estate Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Real Estate Risk: An investment in a REIT generally is subject to the risks that impact the value of the underlying properties or mortgages of the REIT. These risks include loss to casualty or condemnation, and changes in supply and demand, interest rates, zoning laws, regulatory limitations on rents, property taxes, and operating expenses. Other factors that may adversely affect REITs include poor performance by management of the REIT, changes to the tax laws, or failure by the REIT to qualify for favorable tax treatment under the Internal Revenue Code of 1986, as amended (the “Code”), and changes in local, regional, or general economic conditions.
Prospectus Summary | Small-Cap Value Series | · Liquidity/Redemption Risk  
Risk/Return: oef_RiskReturnAbstract  
Risk [Text Block] oef_RiskTextBlock

· Liquidity/Redemption Risk: The Fund may lose money when selling securities at inopportune times to fulfill shareholder redemption requests. The risk of loss may increase depending on the size and frequency of redemption requests, whether the redemption requests occur in times of overall market turmoil or declining prices, and whether the securities the Fund intends to sell have decreased in value or are illiquid. The Fund may be less able to sell illiquid securities at its desired time or price. It may be more difficult for the Fund to value its investments in illiquid securities than more liquid securities.
Prospectus Summary | Small-Cap Value Series | Russell 2000® Value Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel Russell 2000® Value Index
Average Annual Return, Percent oef_AvgAnnlRtrPct 12.59%
Average Annual Return, Percent oef_AvgAnnlRtrPct 8.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 9.27%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.39%
Performance Inception Date oef_PerfInceptionDate Apr. 04, 2017
Prospectus Summary | Small-Cap Value Series | S&P 500® Index  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Label [Optional Text] oef_AverageAnnualReturnLabel S&P 500® Index
Average Annual Return, Percent oef_AvgAnnlRtrPct 17.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.42%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.82%
Average Annual Return, Percent oef_AvgAnnlRtrPct 14.86%
Performance Inception Date oef_PerfInceptionDate Apr. 04, 2017
Prospectus Summary | Small-Cap Value Series | Class A Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1],[2]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.21%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 691
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 937
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 1,202
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,957
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 691
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 937
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 1,202
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,957
Highest Quarterly Return, Label [Optional Text] oef_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date oef_BarChartHighestQuarterlyReturnDate Dec. 31, 2020
Highest Quarterly Return oef_BarChartHighestQuarterlyReturn 29.79%
Lowest Quarterly Return, Label [Optional Text] oef_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date oef_BarChartLowestQuarterlyReturnDate Mar. 31, 2020
Lowest Quarterly Return oef_BarChartLowestQuarterlyReturn (37.69%)
Average Annual Return, Percent oef_AvgAnnlRtrPct (5.18%)
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.98%
Annual Return [Percent] oef_AnnlRtrPct 20.47%
Annual Return [Percent] oef_AnnlRtrPct 6.31%
Annual Return [Percent] oef_AnnlRtrPct (11.88%)
Annual Return [Percent] oef_AnnlRtrPct 20.26%
Annual Return [Percent] oef_AnnlRtrPct (1.48%)
Annual Return [Percent] oef_AnnlRtrPct 26.43%
Annual Return [Percent] oef_AnnlRtrPct (17.49%)
Annual Return [Percent] oef_AnnlRtrPct 19.81%
Annual Return [Percent] oef_AnnlRtrPct 12.85%
Annual Return [Percent] oef_AnnlRtrPct 0.60%
Prospectus Summary | Small-Cap Value Series | Class A Shares | After Taxes on Distributions  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct (6.57%)
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.18%
Average Annual Return, Percent oef_AvgAnnlRtrPct 3.59%
Prospectus Summary | Small-Cap Value Series | Class A Shares | After Taxes on Distributions and Sales  
Risk/Return: oef_RiskReturnAbstract  
Average Annual Return, Percent oef_AvgAnnlRtrPct (2.05%)
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.52%
Average Annual Return, Percent oef_AvgAnnlRtrPct 4.33%
Prospectus Summary | Small-Cap Value Series | Class C Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1],[3]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.96%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 299
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 615
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 1,057
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 2,091
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 199
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 615
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 1,057
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 2,091
Average Annual Return, Percent oef_AvgAnnlRtrPct (0.52%) [4]
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.47% [4]
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.82% [4]
Prospectus Summary | Small-Cap Value Series | Class F Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.10%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.06%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 108
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 337
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 585
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,294
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 108
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 337
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 585
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,294
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.74%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.40%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.77%
Prospectus Summary | Small-Cap Value Series | Class F3 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.89%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 284
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 493
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,096
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 91
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 284
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 493
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,096
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.95%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.60%
Average Annual Return, Percent oef_AvgAnnlRtrPct 5.75%
Performance Inception Date oef_PerfInceptionDate Apr. 04, 2017
Prospectus Summary | Small-Cap Value Series | Class I Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.96%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 306
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 531
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,178
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 98
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 306
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 531
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,178
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.86%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.52%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.88%
Prospectus Summary | Small-Cap Value Series | Class P Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.45%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.41%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 144
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 446
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 771
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,691
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 144
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 446
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 771
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,691
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.44%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.03%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.40%
Prospectus Summary | Small-Cap Value Series | Class R2 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.60%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.56%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 159
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 493
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 850
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,856
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 159
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 493
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 850
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,856
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.35%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.88%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.25%
Prospectus Summary | Small-Cap Value Series | Class R3 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.50%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.46%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 149
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 462
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 797
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,746
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 149
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 462
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 797
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,746
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.36%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.98%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.35%
Prospectus Summary | Small-Cap Value Series | Class R4 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 1.21%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 123
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 384
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 665
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,466
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 123
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 384
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 665
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,466
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.62%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.25%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.62%
Prospectus Summary | Small-Cap Value Series | Class R5 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.21%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.96%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 98
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 306
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 531
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,178
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 98
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 306
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 531
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,178
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.91%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.52%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.89%
Prospectus Summary | Small-Cap Value Series | Class R6 Shares  
Risk/Return: oef_RiskReturnAbstract  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) oef_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 0.00% [1]
Maximum Deferred Sales Charge (as a percentage of Offering Price) oef_MaximumDeferredSalesChargeOverOfferingPrice 0.00% [1]
Management Fees (as a percentage of Assets) oef_ManagementFeesOverAssets 0.75%
Distribution and Service (12b-1) Fees oef_DistributionAndService12b1FeesOverAssets 0.00%
Other Expenses (as a percentage of Assets): oef_OtherExpensesOverAssets 0.14%
Expenses (as a percentage of Assets) oef_ExpensesOverAssets 0.89%
Expense Example, with Redemption, 1 Year oef_ExpenseExampleYear01 $ 91
Expense Example, with Redemption, 3 Years oef_ExpenseExampleYear03 284
Expense Example, with Redemption, 5 Years oef_ExpenseExampleYear05 493
Expense Example, with Redemption, 10 Years oef_ExpenseExampleYear10 1,096
Expense Example, No Redemption, 1 Year oef_ExpenseExampleNoRedemptionYear01 91
Expense Example, No Redemption, 3 Years oef_ExpenseExampleNoRedemptionYear03 284
Expense Example, No Redemption, 5 Years oef_ExpenseExampleNoRedemptionYear05 493
Expense Example, No Redemption, 10 Years oef_ExpenseExampleNoRedemptionYear10 $ 1,096
Average Annual Return, Percent oef_AvgAnnlRtrPct 0.95%
Average Annual Return, Percent oef_AvgAnnlRtrPct 7.60%
Average Annual Return, Percent oef_AvgAnnlRtrPct 6.97%
[1]

A shareholder transacting in share classes without a front-end sales charge may be required to pay a commission to its financial intermediary. Please contact your financial intermediary for more information about whether such a commission may apply to your transaction.
[2]

A contingent deferred sales charge (“CDSC”) of 1.00% may be assessed on certain Class A shares purchased or acquired without a sales charge if they are redeemed before the first day of the month in which the one-year anniversary of the purchase falls.
[3]

A CDSC of 1.00% may be assessed on Class C shares if they are redeemed before the first anniversary of their purchase.

[4]

Class C shares convert to Class A shares eight years after purchase. Class C share performance does not reflect the impact of such conversion to Class A shares.