| Shareholder Report | 6 Months Ended |
| May 31, 2024 USD ($) Holding |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | LORD ABBETT RESEARCH FUND INC |
| Entity Central Index Key | 0000887194 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | May 31, 2024 |
| C000019105 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class C |
| Trading Symbol | LSRCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B19"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $106 1.96% |
| Expenses Paid, Amount | $ 106 |
| Expense Ratio, Percent | 1.96% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156660 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class R5 |
| Trading Symbol | LRSTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B39"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $52 0.96% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.96% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156656 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class R4 |
| Trading Symbol | LGOSX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B59"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $52 0.96% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.96% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156653 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class R4 |
| Trading Symbol | LAMSX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B79"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $48 0.89% |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.89% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019088 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class A |
| Trading Symbol | LAMAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B99"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $48 0.89% |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.89% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054722 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class R2 |
| Trading Symbol | LRSQX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B119"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R2 $84 1.56% |
| Expenses Paid, Amount | $ 84 |
| Expense Ratio, Percent | 1.56% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156661 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class R6 |
| Trading Symbol | LRSVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B139"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $48 0.88% |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.88% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054715 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class F |
| Trading Symbol | LGOFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B159"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F $44 0.81% |
| Expenses Paid, Amount | $ 44 |
| Expense Ratio, Percent | 0.81% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019106 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class P |
| Trading Symbol | LRSPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B179"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class P $76 1.41% |
| Expenses Paid, Amount | $ 76 |
| Expense Ratio, Percent | 1.41% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054712 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class F |
| Trading Symbol | LAMFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B199"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F $34 0.64% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.64% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000188284 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class F3 |
| Trading Symbol | LRSOX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B219"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F3 $48 0.88% |
| Expenses Paid, Amount | $ 48 |
| Expense Ratio, Percent | 0.88% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019097 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class I |
| Trading Symbol | LMGYX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B239"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $38 0.71% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.71% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054723 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class R3 |
| Trading Symbol | LRSRX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B259"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $79 1.46% |
| Expenses Paid, Amount | $ 79 |
| Expense Ratio, Percent | 1.46% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019095 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class C |
| Trading Symbol | LMGCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B279"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $92 1.71% |
| Expenses Paid, Amount | $ 92 |
| Expense Ratio, Percent | 1.71% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019091 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class P |
| Trading Symbol | LAMPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B299"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class P $59 1.09% |
| Expenses Paid, Amount | $ 59 |
| Expense Ratio, Percent | 1.09% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156657 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class R5 |
| Trading Symbol | LGOTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B319"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $38 0.71% |
| Expenses Paid, Amount | $ 38 |
| Expense Ratio, Percent | 0.71% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054716 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class R2 |
| Trading Symbol | LGOQX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B339"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R2 $71 1.31% |
| Expenses Paid, Amount | $ 71 |
| Expense Ratio, Percent | 1.31% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156654 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class R5 |
| Trading Symbol | LAMTX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B359"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R5 $34 0.64% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.64% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019103 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class A |
| Trading Symbol | LRSCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B379"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $65 1.21% |
| Expenses Paid, Amount | $ 65 |
| Expense Ratio, Percent | 1.21% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156658 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class R6 |
| Trading Symbol | LGOVX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B399"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $34 0.63% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.63% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054717 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class R3 |
| Trading Symbol | LGORX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B419"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $65 1.21% |
| Expenses Paid, Amount | $ 65 |
| Expense Ratio, Percent | 1.21% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019092 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class I |
| Trading Symbol | LAMYX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B439"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $34 0.64% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.64% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156659 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class R4 |
| Trading Symbol | LRSSX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B459"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R4 $65 1.21% |
| Expenses Paid, Amount | $ 65 |
| Expense Ratio, Percent | 1.21% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000188282 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class F3 |
| Trading Symbol | LOMGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B479"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F3 $34 0.63% |
| Expenses Paid, Amount | $ 34 |
| Expense Ratio, Percent | 0.63% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054713 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class R2 |
| Trading Symbol | LAMQX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B499"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R2 $67 1.24% |
| Expenses Paid, Amount | $ 67 |
| Expense Ratio, Percent | 1.24% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019096 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class P |
| Trading Symbol | LGOPX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B519"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class P $63 1.16% |
| Expenses Paid, Amount | $ 63 |
| Expense Ratio, Percent | 1.16% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054721 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class F |
| Trading Symbol | LRSFX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B539"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F $57 1.06% |
| Expenses Paid, Amount | $ 57 |
| Expense Ratio, Percent | 1.06% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000156655 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class R6 |
| Trading Symbol | LAMHX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B559"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R6 $31 0.58% |
| Expenses Paid, Amount | $ 31 |
| Expense Ratio, Percent | 0.58% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019090 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class C |
| Trading Symbol | LAMCX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B579"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $88 1.64% |
| Expenses Paid, Amount | $ 88 |
| Expense Ratio, Percent | 1.64% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019093 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Growth Opportunities Fund |
| Class Name | Class A |
| Trading Symbol | LMGAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Growth Opportunities Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B599"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $52 0.96% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.96% |
| AssetsNet | $ 454,917,924 |
| Holdings Count | Holding | 72 |
| Advisory Fees Paid, Amount | $ 1,079,510 |
| InvestmentCompanyPortfolioTurnover | 58% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $454,917,924 # of Portfolio Holdings 72 Portfolio Turnover Rate 58% Total Advisory Fees Paid $1,079,510 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communications 17.89 % Consumer Cyclical 14.57 % Consumer Non-Cyclical 17.42 % Financial 7.40 % Industrial 14.42 % Technology 27.13 % Repurchase Agreements 1.17 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000019107 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Small-Cap Value Fund |
| Class Name | Class I |
| Trading Symbol | LRSYX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Small-Cap Value Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B619"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class I $52 0.96% |
| Expenses Paid, Amount | $ 52 |
| Expense Ratio, Percent | 0.96% |
| AssetsNet | $ 402,905,673 |
| Holdings Count | Holding | 69 |
| Advisory Fees Paid, Amount | $ 1,480,433 |
| InvestmentCompanyPortfolioTurnover | 28% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $402,905,673 # of Portfolio Holdings 69 Portfolio Turnover Rate 28% Total Advisory Fees Paid $1,480,433 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 3.93 % Consumer Discretionary 9.70 % Consumer Staples 2.48 % Energy 9.64 % Financials 25.11 % Healthcare 6.31 % Industrials 17.38 % Information Technology 13.14 % Materials 6.11 % Real Estate 2.72 % Utilities 1.22 % Repurchase Agreements 0.89 % Money Market Funds Footnote Reference 1.23 % Time Deposits Footnote Reference 0.14 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives Footnote Securities were purchased with the cash collateral from loaned securities. |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000188280 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class F3 |
| Trading Symbol | LRMAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B639"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class F3 $31 0.58% |
| Expenses Paid, Amount | $ 31 |
| Expense Ratio, Percent | 0.58% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
| C000054714 | |
| Shareholder Report [Line Items] | |
| Fund Name | Lord Abbett Dividend Growth Fund |
| Class Name | Class R3 |
| Trading Symbol | LAMRX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the Lord Abbett Dividend Growth Fund for the period of December 1, 2023 to May 31, 2024, as well as certain changes to the Fund. |
| Shareholder Report Annual or Semi-Annual | Semi-Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at lordabbett.com/FundDocuments |
| Additional Information Phone Number | 888-522-2388 |
| Additional Information Website | lordabbett.com/FundDocuments</span>" id="sjs-B659"><span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 20px; margin: 0px; overflow: visible; text-align: left; height: auto; max-height: none; min-height: 0px;">lordabbett.com/FundDocuments</span> |
| Expenses [Text Block] | What were the Fund costs for the last period? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class R3 $61 1.14% |
| Expenses Paid, Amount | $ 61 |
| Expense Ratio, Percent | 1.14% |
| AssetsNet | $ 3,849,464,967 |
| Holdings Count | Holding | 55 |
| Advisory Fees Paid, Amount | $ 9,849,575 |
| InvestmentCompanyPortfolioTurnover | 13% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics (as of May 31, 2024) Total Net Assets $3,849,464,967 # of Portfolio Holdings 55 Portfolio Turnover Rate 13% Total Advisory Fees Paid $9,849,575 |
| Holdings [Text Block] | Portfolio Holdings Presented by Sector Footnote Reference % Footnote Reference Communication Services 1.39 % Consumer Discretionary 5.44 % Consumer Staples 8.25 % Energy 4.66 % Financials 19.08 % Health Care 12.02 % Industrials 8.90 % Information Technology 30.62 % Materials 4.72 % Utilities 3.84 % Repurchase Agreements 1.08 % Total 100.00% Footnote Description Footnote A sector may comprise several industries Footnote Represents percent of total investments, which excludes derivatives |
| Material Fund Change [Text Block] | Summary of Fund Changes There were no material fund changes during the period. |
