v3.26.1
Fees and Expenses - Prospectus Summary
Nov. 30, 2025
USD ($)
Lord Abbett Dividend Growth Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] FEES AND EXPENSES
Expense Narrative [Text Block]

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”).
Expense Breakpoint Discounts [Text] 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] $ 50,000
Shareholder Fees Caption [Optional Text] Shareholder Fees (Fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Prospectus Summary - Lord Abbett Dividend Growth Fund
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) [1] 5.75% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) [1] 0.00% [2] 1.00% [3] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
[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.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Prospectus Summary - Lord Abbett Dividend Growth Fund
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Management Fees (as a percentage of Assets) 0.52% 0.52% 0.52% 0.52% 0.52% 0.52% 0.52% 0.52% 0.52% 0.52% 0.52%
Distribution and Service (12b-1) Fees 0.25% 1.00% 0.10% 0.00% 0.00% 0.45% 0.60% 0.50% 0.25% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.12% 0.12% 0.12% 0.07% 0.12% 0.12% 0.12% 0.12% 0.12% 0.12% 0.07%
Expenses (as a percentage of Assets) 0.89% 1.64% 0.74% 0.59% 0.64% 1.09% 1.24% 1.14% 0.89% 0.64% 0.59%
Fee Waiver or Reimbursement 0.00% 0.00% (0.10%) [1] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Net Expenses (as a percentage of Assets) 0.89% 1.64% 0.64% 0.59% 0.64% 1.09% 1.24% 1.14% 0.89% 0.64% 0.59%
Fee Waiver or Reimbursement over Assets, Date of Termination     March 31, 2027                
[1]

For the period from April 1, 2026 through March 31, 2027, Lord Abbett Distributor LLC (“Lord Abbett Distributor”) has contractually agreed to waive the Fund’s 0.10% Rule 12b-1 fee for Class F shares. This agreement may be terminated only by the Fund’s Board of Directors.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same, giving effect to the fee waiver and expense reimbursement arrangement described above. Class C shares automatically convert to Class A shares after eight years. The expense example for Class C shares for the ten-year period reflects the conversion to Class A shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] If Shares Are Redeemed
Expense Example, With Redemption [Table]
Expense Example - Prospectus Summary - Lord Abbett Dividend Growth Fund - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, with Redemption, 1 Year $ 661 $ 267 $ 65 $ 60 $ 65 $ 111 $ 126 $ 116 $ 91 $ 65 $ 60
Expense Example, with Redemption, 3 Years 843 517 226 189 205 347 393 362 284 205 189
Expense Example, with Redemption, 5 Years 1,040 892 402 329 357 601 681 628 493 357 329
Expense Example, with Redemption, 10 Years $ 1,608 $ 1,743 $ 909 $ 738 $ 798 $ 1,329 $ 1,500 $ 1,386 $ 1,096 $ 798 $ 738
Expense Example, No Redemption, By Year, Caption [Text] If Shares Are Not Redeemed
Expense Example, No Redemption [Table]
Expense Example, No Redemption - Prospectus Summary - Lord Abbett Dividend Growth Fund - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, No Redemption, 1 Year $ 661 $ 167 $ 65 $ 60 $ 65 $ 111 $ 126 $ 116 $ 91 $ 65 $ 60
Expense Example, No Redemption, 3 Years 843 517 226 189 205 347 393 362 284 205 189
Expense Example, No Redemption, 5 Years 1,040 892 402 329 357 601 681 628 493 357 329
Expense Example, No Redemption, 10 Years $ 1,608 $ 1,743 $ 909 $ 738 $ 798 $ 1,329 $ 1,500 $ 1,386 $ 1,096 $ 798 $ 738
Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block] 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 30% of the average value of its portfolio.
Portfolio Turnover, Rate 30.00%
Lord Abbett Growth Opportunities Fund  
Prospectus [Line Items]  
Expense Heading [Optional Text] FEES AND EXPENSES
Expense Narrative [Text Block]

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”).
Expense Breakpoint Discounts [Text] 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] $ 50,000
Shareholder Fees Caption [Optional Text] Shareholder Fees (Fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Prospectus Summary - Lord Abbett Growth Opportunities Fund
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) [1] 5.75% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) [1] 0.00% [2] 1.00% [3] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
[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.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Prospectus Summary - Lord Abbett Growth Opportunities Fund
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Management Fees (as a percentage of Assets) 0.65% 0.65% 0.65% 0.65% 0.65% 0.65% 0.65% 0.65% 0.65% 0.65% 0.65%
Distribution and Service (12b-1) Fees 0.25% 1.00% 0.10% 0.00% 0.00% 0.45% 0.60% 0.50% 0.25% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.21% 0.21% 0.21% 0.12% 0.21% 0.21% 0.21% 0.21% 0.21% 0.21% 0.12%
Expenses (as a percentage of Assets) 1.11% 1.86% 0.96% 0.77% 0.86% 1.31% 1.46% 1.36% 1.11% 0.86% [1] 0.77%
Fee Waiver or Reimbursement [2] (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%) (0.15%)
Net Expenses (as a percentage of Assets) [2] 0.96% 1.71% 0.81% 0.62% [1] 0.71% 1.16% 1.31% 1.21% 0.96% 0.71% 0.62% [1]
Fee Waiver or Reimbursement over Assets, Date of Termination March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027 March 31, 2027
[1]

These amounts have been updated from fiscal year amounts to reflect current fees and expenses.
[2]

For the period from April 1, 2026 through March 31, 2027, Lord, Abbett & Co. LLC (“Lord Abbett”) has contractually agreed to waive its fees and reimburse expenses to the extent necessary to limit total net annual operating expenses, excluding any applicable 12b-1 fees, acquired fund fees and expenses, interest-related expenses, taxes, expenses related to litigation and potential litigation, and extraordinary expenses, to an annual rate of 0.62% for each of Class F3 and R6 shares and to an annual rate of 0.71% for each other class. This agreement may be terminated only by the Fund’s Board of Directors.
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same, giving effect to the fee waiver and expense reimbursement arrangement described above. Class C shares automatically convert to Class A shares after eight years. The expense example for Class C shares for the ten-year period reflects the conversion to Class A shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] If Shares Are Redeemed
Expense Example, With Redemption [Table]
Expense Example - Prospectus Summary - Lord Abbett Growth Opportunities Fund - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, with Redemption, 1 Year $ 667 $ 274 $ 83 $ 63 $ 73 $ 118 $ 133 $ 123 $ 98 $ 73 $ 63
Expense Example, with Redemption, 3 Years 894 570 291 231 259 400 447 416 338 259 231
Expense Example, with Redemption, 5 Years 1,138 992 516 413 462 704 783 730 597 462 413
Expense Example, with Redemption, 10 Years $ 1,836 $ 1,971 $ 1,164 $ 940 $ 1,047 $ 1,566 $ 1,733 $ 1,622 $ 1,338 $ 1,047 $ 940
Expense Example, No Redemption, By Year, Caption [Text] If Shares Are Not Redeemed
Expense Example, No Redemption [Table]
Expense Example, No Redemption - Prospectus Summary - Lord Abbett Growth Opportunities Fund - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, No Redemption, 1 Year $ 667 $ 174 $ 83 $ 63 $ 73 $ 118 $ 133 $ 123 $ 98 $ 73 $ 63
Expense Example, No Redemption, 3 Years 894 570 291 231 259 400 447 416 338 259 231
Expense Example, No Redemption, 5 Years 1,138 992 516 413 462 704 783 730 597 462 413
Expense Example, No Redemption, 10 Years $ 1,836 $ 1,971 $ 1,164 $ 940 $ 1,047 $ 1,566 $ 1,733 $ 1,622 $ 1,338 $ 1,047 $ 940
Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block] 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 100% of the average value of its portfolio.
Portfolio Turnover, Rate 100.00%
Lord Abbett Growth Opportunities Fund | Class F3 Shares  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] These amounts have been updated from fiscal year amounts to reflect current fees and expenses.
Lord Abbett Growth Opportunities Fund | Class R5 Shares  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] These amounts have been updated from fiscal year amounts to reflect current fees and expenses.
Lord Abbett Growth Opportunities Fund | Class R6 Shares  
Prospectus [Line Items]  
Expenses Restated to Reflect Current [Text] These amounts have been updated from fiscal year amounts to reflect current fees and expenses.
Small-Cap Value Series  
Prospectus [Line Items]  
Expense Heading [Optional Text] FEES AND EXPENSES
Expense Narrative [Text Block]

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”).
Expense Breakpoint Discounts [Text] 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] $ 50,000
Shareholder Fees Caption [Optional Text] Shareholder Fees (Fees paid directly from your investment)
Shareholder Fees [Table]
Shareholder Fees - Prospectus Summary - Small-Cap Value Series
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) [1] 5.75% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Maximum Deferred Sales Charge (as a percentage of Offering Price) [1] 0.00% [2] 1.00% [3] 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
[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.

Operating Expenses Caption [Optional Text] Annual Fund Operating Expenses (Expenses that you pay each year as a percentage of the value of your investment)
Annual Fund Operating Expenses [Table]
Annual Fund Operating Expenses - Prospectus Summary - Small-Cap Value Series
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Management Fees (as a percentage of Assets) 0.75% 0.75% 0.75% 0.75% 0.75% 0.75% 0.75% 0.75% 0.75% 0.75% 0.75%
Distribution and Service (12b-1) Fees 0.25% 1.00% 0.10% 0.00% 0.00% 0.45% 0.60% 0.50% 0.25% 0.00% 0.00%
Other Expenses (as a percentage of Assets): 0.21% 0.21% 0.21% 0.14% 0.21% 0.21% 0.21% 0.21% 0.21% 0.21% 0.14%
Expenses (as a percentage of Assets) 1.21% 1.96% 1.06% 0.89% 0.96% 1.41% 1.56% 1.46% 1.21% 0.96% 0.89%
Expense Example [Heading] Example
Expense Example Narrative [Text Block]

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 $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Class C shares automatically convert to Class A shares after eight years. The expense example for Class C shares for the ten-year period reflects the conversion to Class A shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Expense Example by, Year, Caption [Text] If Shares Are Redeemed
Expense Example, With Redemption [Table]
Expense Example - Prospectus Summary - Small-Cap Value Series - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, with Redemption, 1 Year $ 691 $ 299 $ 108 $ 91 $ 98 $ 144 $ 159 $ 149 $ 123 $ 98 $ 91
Expense Example, with Redemption, 3 Years 937 615 337 284 306 446 493 462 384 306 284
Expense Example, with Redemption, 5 Years 1,202 1,057 585 493 531 771 850 797 665 531 493
Expense Example, with Redemption, 10 Years $ 1,957 $ 2,091 $ 1,294 $ 1,096 $ 1,178 $ 1,691 $ 1,856 $ 1,746 $ 1,466 $ 1,178 $ 1,096
Expense Example, No Redemption, By Year, Caption [Text] If Shares Are Not Redeemed
Expense Example, No Redemption [Table]
Expense Example, No Redemption - Prospectus Summary - Small-Cap Value Series - USD ($)
Class A Shares
Class C Shares
Class F Shares
Class F3 Shares
Class I Shares
Class P Shares
Class R2 Shares
Class R3 Shares
Class R4 Shares
Class R5 Shares
Class R6 Shares
Expense Example, No Redemption, 1 Year $ 691 $ 199 $ 108 $ 91 $ 98 $ 144 $ 159 $ 149 $ 123 $ 98 $ 91
Expense Example, No Redemption, 3 Years 937 615 337 284 306 446 493 462 384 306 284
Expense Example, No Redemption, 5 Years 1,202 1,057 585 493 531 771 850 797 665 531 493
Expense Example, No Redemption, 10 Years $ 1,957 $ 2,091 $ 1,294 $ 1,096 $ 1,178 $ 1,691 $ 1,856 $ 1,746 $ 1,466 $ 1,178 $ 1,096
Portfolio Turnover [Heading] Portfolio Turnover
Portfolio Turnover [Text Block] 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 69.00%