This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

<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; text-align-last: auto; white-space-collapse: preserve-breaks;">lordabbett.com/FundDocuments</span>

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$23	0.43%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 23

Expense Ratio, Percent

0.43%

^[1]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000019524

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class C

Trading Symbol

ALFCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$63	1.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.18%

^[2]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000054925

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class F

Trading Symbol

ALFFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$15	0.28%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 15

Expense Ratio, Percent

0.28%

^[3]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000184531

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class F3

Trading Symbol

ALFOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$5	0.10%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

0.10%

^[4]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000019521

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class I

Trading Symbol

ALFYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$10	0.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 10

Expense Ratio, Percent

0.18%

^[5]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000054926

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class R2

Trading Symbol

ALFQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$41	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.78%

^[6]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000054927

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class R3

Trading Symbol

ALFRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$36	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 36

Expense Ratio, Percent

0.68%

^[7]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000155670

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class R4

Trading Symbol

ALFKX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$23	0.43%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 23

Expense Ratio, Percent

0.43%

^[8]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000155671

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class R5

Trading Symbol

ALFTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$10	0.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 10

Expense Ratio, Percent

0.18%

^[9]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000155672

Shareholder Report [Line Items]

Fund Name

Lord Abbett Alpha Strategy Fund

Class Name

Class R6

Trading Symbol

ALFVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Alpha Strategy Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$5	0.10%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 5

Expense Ratio, Percent

0.10%

^[10]

AssetsNet

$ 664,825,239

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

3.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$664,825,239
# of Portfolio Holdings	6
Portfolio Turnover Rate	3%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Portfolio Allocation	%^{Footnote Reference*}
Lord Abbett Developing Growth Fund, Inc. - Class I	20.22%
Lord Abbett Focused Small Cap Value Fund - Class I	9.99%
Lord Abbett International Opportunities Fund - Class I	19.59%
Lord Abbett Micro Cap Growth Fund - Class I	10.20%
Lord Abbett Small Cap Value Fund - Class I	20.03%
Lord Abbett Value Opportunities Fund - Class I	19.97%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.

C000175097

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class A

Trading Symbol

LGCAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$46	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.90%

^[11]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175098

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class C

Trading Symbol

LGCCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$85	1.65%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 85

Expense Ratio, Percent

1.65%

^[12]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175099

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class F

Trading Symbol

LGCFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$39	0.75%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.75%

^[13]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000184543

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class F3

Trading Symbol

LGCOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$29	0.56%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.56%

^[14]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175100

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class I

Trading Symbol

LGCYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$33	0.65%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.65%

^[15]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175102

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class R3

Trading Symbol

LGCRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$59	1.15%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 59

Expense Ratio, Percent

1.15%

^[16]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175103

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class R4

Trading Symbol

LGCSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$46	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.90%

^[17]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175104

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class R5

Trading Symbol

LGCVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$33	0.65%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.65%

^[18]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000175105

Shareholder Report [Line Items]

Fund Name

Lord Abbett Global Equity Fund

Class Name

Class R6

Trading Symbol

LGCWX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Global Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$29	0.56%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.56%

^[19]

AssetsNet

$ 393,914,920

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

25.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$393,914,920
# of Portfolio Holdings	85
Portfolio Turnover Rate	25%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	8.60%
Consumer Discretionary	11.00%
Consumer Staples	4.64%
Energy	3.40%
Financials	15.39%
Health Care	7.26%
Industrials	14.10%
Information Technology	31.40%
Materials	1.49%
Real Estate	0.37%
Utilities	1.03%
Repurchase Agreements	1.32%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019525

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class A

Trading Symbol

LICAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$46	0.87%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.87%

^[20]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000019527

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class C

Trading Symbol

LICCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$86	1.62%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 86

Expense Ratio, Percent

1.62%

^[21]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000054928

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class F

Trading Symbol

LICFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$38	0.72%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.72%

^[22]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000184533

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class F3

Trading Symbol

LICOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$30	0.56%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 30

Expense Ratio, Percent

0.56%

^[23]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000019529

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class I

Trading Symbol

LICYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$33	0.62%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.62%

^[24]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000019528

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class P

Trading Symbol

LICPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class P	$54	1.02%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.02%

^[25]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000054929

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class R2

Trading Symbol

LICQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$65	1.22%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.22%

^[26]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000054930

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class R3

Trading Symbol

LICRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$60	1.12%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 60

Expense Ratio, Percent

1.12%

^[27]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000155673

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class R4

Trading Symbol

LICSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$46	0.87%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.87%

^[28]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000155674

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class R5

Trading Symbol

LICTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$33	0.62%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.62%

^[29]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000155675

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Equity Fund

Class Name

Class R6

Trading Symbol

LICVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$30	0.56%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 30

Expense Ratio, Percent

0.56%

^[30]

AssetsNet

$ 721,922,207

Holdings Count | Holding

111

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$721,922,207
# of Portfolio Holdings	111
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	3.66%
Consumer Discretionary	6.30%
Consumer Staples	4.32%
Energy	3.49%
Financials	22.17%
Health Care	7.52%
Industrials	18.66%
Information Technology	21.94%
Materials	5.87%
Real Estate	0.52%
Utilities	1.78%
Repurchase Agreements	2.85%
Money Market Funds^{Footnote Reference†}	0.83%
Time Deposits^{Footnote Reference†}	0.09%
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.

C000019537

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class A

Trading Symbol

LFVAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$69	1.28%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.28%

^[31]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000212762

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class C

Trading Symbol

LFVCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$109	2.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 109

Expense Ratio, Percent

2.03%

^[32]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000212765

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class F

Trading Symbol

LFSFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$55	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 55

Expense Ratio, Percent

1.03%

^[33]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000212764

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class F3

Trading Symbol

LMVOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$53	0.98%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

0.98%

^[34]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019538

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class I

Trading Symbol

LMVYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$55	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 55

Expense Ratio, Percent

1.03%

^[35]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000212760

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class R5

Trading Symbol

LMVVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$55	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 55

Expense Ratio, Percent

1.03%

^[36]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000212759

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Small Cap Value Fund

Class Name

Class R6

Trading Symbol

LMVWX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Small Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$53	0.99%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

0.99%

^[37]

AssetsNet

$ 95,733,692

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

32.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$95,733,692
# of Portfolio Holdings	42
Portfolio Turnover Rate	32%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.39%
Consumer Discretionary	6.88%
Consumer Staples	4.06%
Energy	7.26%
Financials	25.70%
Health Care	6.57%
Industrials	22.45%
Information Technology	11.20%
Materials	8.76%
Real Estate	2.59%
Utilities	2.47%
Repurchase Agreements	0.67%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208652

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class A

Trading Symbol

LFGAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$51	1.05%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.05%

^[38]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208648

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class C

Trading Symbol

LFGCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$87	1.80%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 87

Expense Ratio, Percent

1.80%

^[39]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208649

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class F

Trading Symbol

LFGFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$39	0.80%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.80%

^[40]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208650

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class F3

Trading Symbol

LFGOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$34	0.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.71%

^[41]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208651

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class I

Trading Symbol

LFGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$39	0.80%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.80%

^[42]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208653

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class R3

Trading Symbol

LFGQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$63	1.30%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.30%

^[43]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208654

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class R4

Trading Symbol

LFGSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$51	1.05%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.05%

^[44]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208655

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class R5

Trading Symbol

LFGTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$39	0.80%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.80%

^[45]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208656

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Growth Fund

Class Name

Class R6

Trading Symbol

LFGVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$34	0.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.71%

^[46]

AssetsNet

$ 162,700,173

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$162,700,173
# of Portfolio Holdings	34
Portfolio Turnover Rate	75%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.58%
Consumer Discretionary	6.00%
Consumer Staples	1.20%
Financials	2.17%
Health Care	15.61%
Industrials	16.29%
Information Technology	44.69%
Repurchase Agreements	2.46%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209879

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class A

Trading Symbol

LAFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$49	0.96%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.96%

^[47]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209875

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class C

Trading Symbol

LCFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$87	1.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 87

Expense Ratio, Percent

1.71%

^[48]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209876

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class F

Trading Symbol

LFFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$36	0.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 36

Expense Ratio, Percent

0.71%

^[49]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209877

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class F3

Trading Symbol

LOFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$32	0.63%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.63%

^[50]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209878

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class I

Trading Symbol

LIFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$36	0.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 36

Expense Ratio, Percent

0.71%

^[51]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209880

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class R3

Trading Symbol

LQFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$62	1.21%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.21%

^[52]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209881

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class R4

Trading Symbol

LSFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$49	0.96%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.96%

^[53]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209882

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class R5

Trading Symbol

LFLTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$36	0.71%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 36

Expense Ratio, Percent

0.71%

^[54]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000209883

Shareholder Report [Line Items]

Fund Name

Lord Abbett Focused Large Cap Value Fund

Class Name

Class R6

Trading Symbol

LVFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Focused Large Cap Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$32	0.63%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.63%

^[55]

AssetsNet

$ 148,305,663

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$148,305,663
# of Portfolio Holdings	32
Portfolio Turnover Rate	35%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.59%
Consumer Discretionary	10.06%
Consumer Staples	5.61%
Energy	7.93%
Financials	20.49%
Health Care	11.44%
Industrials	14.17%
Information Technology	17.07%
Materials	2.91%
Real Estate	3.52%
Repurchase Agreements	1.21%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019515

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class A

Trading Symbol

LDFVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$48	0.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.93%

^[56]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019517

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class C

Trading Symbol

GILAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$87	1.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 87

Expense Ratio, Percent

1.68%

^[57]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054922

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class F

Trading Symbol

LAVFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$41	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.78%

^[58]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000184529

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class F3

Trading Symbol

LDFOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$32	0.62%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.62%

^[59]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019519

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class I

Trading Symbol

LAVYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$35	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.68%

^[60]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019518

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class P

Trading Symbol

LAVPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class P	$59	1.13%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 59

Expense Ratio, Percent

1.13%

^[61]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054923

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class R2

Trading Symbol

LAVQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$66	1.28%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 66

Expense Ratio, Percent

1.28%

^[62]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054924

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class R3

Trading Symbol

LAVRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$61	1.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.18%

^[63]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155667

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class R4

Trading Symbol

LAVSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$49	0.94%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[64]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155668

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class R5

Trading Symbol

LAVTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$35	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.68%

^[65]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155669

Shareholder Report [Line Items]

Fund Name

Lord Abbett Fundamental Equity Fund

Class Name

Class R6

Trading Symbol

LAVVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Fundamental Equity Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$32	0.62%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.62%

^[66]

AssetsNet

$ 2,210,839,803

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$2,210,839,803
# of Portfolio Holdings	57
Portfolio Turnover Rate	22%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	5.52%
Consumer Discretionary	6.97%
Consumer Staples	4.47%
Energy	8.16%
Financials	20.26%
Health Care	14.14%
Industrials	14.87%
Information Technology	14.05%
Materials	5.03%
Real Estate	1.75%
Utilities	4.31%
Repurchase Agreements	0.47%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101588

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class A

Trading Symbol

LGLAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$44	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.90%

^[67]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101589

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class C

Trading Symbol

LGLCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$80	1.65%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 80

Expense Ratio, Percent

1.65%

^[68]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101590

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class F

Trading Symbol

LGLFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$31	0.64%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 31

Expense Ratio, Percent

0.64%

^[69]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000184541

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class F3

Trading Symbol

LGLOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$28	0.57%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 28

Expense Ratio, Percent

0.57%

^[70]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101591

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class I

Trading Symbol

LGLIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$31	0.64%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 31

Expense Ratio, Percent

0.64%

^[71]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101592

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class R2

Trading Symbol

LGLQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$61	1.25%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.25%

^[72]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000101593

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class R3

Trading Symbol

LGLRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$56	1.15%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.15%

^[73]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155685

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class R4

Trading Symbol

LGLSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$44	0.90%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.90%

^[74]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155686

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class R5

Trading Symbol

LGLUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$32	0.65%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.65%

^[75]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155687

Shareholder Report [Line Items]

Fund Name

Lord Abbett Growth Leaders Fund

Class Name

Class R6

Trading Symbol

LGLVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Growth Leaders Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$28	0.57%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 28

Expense Ratio, Percent

0.57%

^[76]

AssetsNet

$ 7,549,340,877

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

50.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$7,549,340,877
# of Portfolio Holdings	62
Portfolio Turnover Rate	50%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	11.27%
Consumer Discretionary	7.44%
Consumer Staples	0.91%
Energy	0.41%
Financials	1.28%
Health Care	13.79%
Industrials	16.81%
Information Technology	44.25%
Repurchase Agreements	3.84%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000208658

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class A

Trading Symbol

LHCAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$51	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.03%

^[77]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208659

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class C

Trading Symbol

LHCCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$88	1.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 88

Expense Ratio, Percent

1.78%

^[78]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208660

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class F

Trading Symbol

LHCFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$39	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.78%

^[79]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208661

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class F3

Trading Symbol

LHCOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$34	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.68%

^[80]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208662

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class I

Trading Symbol

LHCIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$39	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.78%

^[81]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208664

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class R3

Trading Symbol

LHCQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$63	1.28%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.28%

^[82]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208665

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class R4

Trading Symbol

LHCSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$51	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.03%

^[83]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208667

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class R5

Trading Symbol

LHCTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$39	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.78%

^[84]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000208666

Shareholder Report [Line Items]

Fund Name

Lord Abbett Health Care Fund

Class Name

Class R6

Trading Symbol

LHCVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Health Care Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$34	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.68%

^[85]

AssetsNet

$ 8,118,556

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$8,118,556
# of Portfolio Holdings	64
Portfolio Turnover Rate	37%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Industry	% ^{Footnote Reference*}
Biotechnology	41.41%
Health Care Equipment & Supplies	6.96%
Health Care Providers & Services	10.98%
Health Care Technology	0.85%
Life Sciences Tools & Services	4.67%
Pharmaceuticals	31.50%
Repurchase Agreements	1.75%
Money Market Funds^{Footnote Reference**}	1.69%
Time Deposits^{Footnote Reference**}	0.19%
Total	100.00%

Footnote	Description
Footnote*	Represents percent of total investments, which excludes derivatives.
Footnote**	Securities were purchased with the cash collateral from loaned securities.

C000019658

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class A

Trading Symbol

LAIEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.23%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.23%

^[86]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000019660

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class C

Trading Symbol

LINCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$105	1.98%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 105

Expense Ratio, Percent

1.98%

^[87]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000054937

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class F

Trading Symbol

LINFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$57	1.08%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 57

Expense Ratio, Percent

1.08%

^[88]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000184538

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class F3

Trading Symbol

LOIEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$48	0.91%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.91%

^[89]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000019662

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class I

Trading Symbol

LINYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$52	0.98%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.98%

^[90]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000019661

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class P

Trading Symbol

LINPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class P	$75	1.42%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 75

Expense Ratio, Percent

1.42%

^[91]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000054938

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class R2

Trading Symbol

LINQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$84	1.58%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 84

Expense Ratio, Percent

1.58%

^[92]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000054939

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class R3

Trading Symbol

LINRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$79	1.48%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 79

Expense Ratio, Percent

1.48%

^[93]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000155679

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class R4

Trading Symbol

LINSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$65	1.23%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.23%

^[94]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000155680

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class R5

Trading Symbol

LINTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$52	0.98%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.98%

^[95]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000155681

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Opportunities Fund

Class Name

Class R6

Trading Symbol

LINVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$48	0.91%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.91%

^[96]

AssetsNet

$ 347,439,022

Holdings Count | Holding

108

InvestmentCompanyPortfolioTurnover

67.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$347,439,022
# of Portfolio Holdings	108
Portfolio Turnover Rate	67%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	1.33%
Consumer Discretionary	8.74%
Consumer Staples	3.92%
Energy	6.27%
Financials	9.86%
Health Care	5.43%
Industrials	32.29%
Information Technology	19.03%
Materials	8.25%
Real Estate	2.57%
Utilities	0.77%
Repurchase Agreements	0.84%
Money Market Funds^{Footnote Reference†}	0.63%
Time Deposits^{Footnote Reference†}	0.07%
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.

C000065058

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class A

Trading Symbol

LIDAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$49	0.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.93%

^[97]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000065060

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class C

Trading Symbol

LIDCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$89	1.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 89

Expense Ratio, Percent

1.68%

^[98]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000065061

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class F

Trading Symbol

LIDFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$41	0.78%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.78%

^[99]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000184539

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class F3

Trading Symbol

LIDOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$32	0.61%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.61%

^[100]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000065062

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class I

Trading Symbol

LAIDX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$36	0.68%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 36

Expense Ratio, Percent

0.68%

^[101]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000065063

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class R2

Trading Symbol

LIDRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$68	1.28%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 68

Expense Ratio, Percent

1.28%

^[102]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000065064

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class R3

Trading Symbol

LIRRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$63	1.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.18%

^[103]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000155682

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class R4

Trading Symbol

LIRSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$49	0.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.93%

^[104]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000155683

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class R5

Trading Symbol

LIRTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$35	0.66%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.66%

^[105]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000155684

Shareholder Report [Line Items]

Fund Name

Lord Abbett International Value Fund

Class Name

Class R6

Trading Symbol

LIRVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett International Value Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$32	0.61%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.61%

^[106]

AssetsNet

$ 514,883,210

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$514,883,210
# of Portfolio Holdings	81
Portfolio Turnover Rate	34%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.91%
Consumer Discretionary	4.67%
Consumer Staples	6.11%
Energy	6.83%
Financials	34.37%
Health Care	7.23%
Industrials	13.19%
Information Technology	7.21%
Materials	7.69%
Utilities	5.44%
Repurchase Agreements	3.05%
Money Market Funds^{Footnote Reference†}	1.17%
Time Deposits^{Footnote Reference†}	0.13%
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.

C000019535

Shareholder Report [Line Items]

Fund Name

Lord Abbett Micro Cap Growth Fund

Class Name

Class A

Trading Symbol

LAMGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Micro Cap Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$71	1.36%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.36%

^[107]

AssetsNet

$ 203,608,823

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$203,608,823
# of Portfolio Holdings	82
Portfolio Turnover Rate	46%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.96%
Consumer Discretionary	7.97%
Consumer Staples	3.28%
Financials	6.85%
Health Care	27.16%
Industrials	23.47%
Information Technology	19.54%
Repurchase Agreements	1.32%
Money Market Funds^{Footnote Reference†}	6.70%
Time Deposits^{Footnote Reference†}	0.75%
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.

C000221454

Shareholder Report [Line Items]

Fund Name

Lord Abbett Micro Cap Growth Fund

Class Name

Class C

Trading Symbol

LCMGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Micro Cap Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$111	2.11%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 111

Expense Ratio, Percent

2.11%

^[108]

AssetsNet

$ 203,608,823

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$203,608,823
# of Portfolio Holdings	82
Portfolio Turnover Rate	46%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.96%
Consumer Discretionary	7.97%
Consumer Staples	3.28%
Financials	6.85%
Health Care	27.16%
Industrials	23.47%
Information Technology	19.54%
Repurchase Agreements	1.32%
Money Market Funds^{Footnote Reference†}	6.70%
Time Deposits^{Footnote Reference†}	0.75%
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.

C000221457

Shareholder Report [Line Items]

Fund Name

Lord Abbett Micro Cap Growth Fund

Class Name

Class F

Trading Symbol

LFMGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Micro Cap Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$58	1.11%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.11%

^[109]

AssetsNet

$ 203,608,823

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$203,608,823
# of Portfolio Holdings	82
Portfolio Turnover Rate	46%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.96%
Consumer Discretionary	7.97%
Consumer Staples	3.28%
Financials	6.85%
Health Care	27.16%
Industrials	23.47%
Information Technology	19.54%
Repurchase Agreements	1.32%
Money Market Funds^{Footnote Reference†}	6.70%
Time Deposits^{Footnote Reference†}	0.75%
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.

C000019536

Shareholder Report [Line Items]

Fund Name

Lord Abbett Micro Cap Growth Fund

Class Name

Class I

Trading Symbol

LMIYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Micro Cap Growth Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$58	1.11%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.11%

^[110]

AssetsNet

$ 203,608,823

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$203,608,823
# of Portfolio Holdings	82
Portfolio Turnover Rate	46%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Communication Services	2.96%
Consumer Discretionary	7.97%
Consumer Staples	3.28%
Financials	6.85%
Health Care	27.16%
Industrials	23.47%
Information Technology	19.54%
Repurchase Agreements	1.32%
Money Market Funds^{Footnote Reference†}	6.70%
Time Deposits^{Footnote Reference†}	0.75%
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.

C000019539

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class A

Trading Symbol

LVOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$62	1.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.18%

^[111]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019541

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class C

Trading Symbol

LVOCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$102	1.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 102

Expense Ratio, Percent

1.93%

^[112]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054934

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class F

Trading Symbol

LVOFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F	$54	1.03%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.03%

^[113]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000184535

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class F3

Trading Symbol

LVOOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class F3	$44	0.84%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.84%

^[114]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019543

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class I

Trading Symbol

LVOYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.93%

^[115]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000019542

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class P

Trading Symbol

LVOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class P	$73	1.38%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 73

Expense Ratio, Percent

1.38%

^[116]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054935

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class R2

Trading Symbol

LVOQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R2	$81	1.53%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 81

Expense Ratio, Percent

1.53%

^[117]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000054936

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class R3

Trading Symbol

LVORX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R3	$76	1.43%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 76

Expense Ratio, Percent

1.43%

^[118]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155676

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class R4

Trading Symbol

LVOSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R4	$62	1.18%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.18%

^[119]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155677

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class R5

Trading Symbol

LVOTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R5	$49	0.93%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.93%

^[120]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

C000155678

Shareholder Report [Line Items]

Fund Name

Lord Abbett Value Opportunities Fund

Class Name

Class R6

Trading Symbol

LVOVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about the Lord Abbett Value Opportunities Fund for the period of November 1, 2025 to April 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at lordabbett.com/FundDocuments. You can also request this information by contacting us at 888-522-2388.

Additional Information Phone Number

888-522-2388

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last period?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$44	0.84%^{Footnote Reference(a)}

Footnote	Description
Footnote^(a)	Annualized.

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.84%

^[121]

AssetsNet

$ 1,133,631,545

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

(as of April 30, 2026)

Table Summary
Total Net Assets	$1,133,631,545
# of Portfolio Holdings	64
Portfolio Turnover Rate	16%

Holdings [Text Block]

Table Summary
Portfolio Holdings Presented by Sector^{Footnote Reference*}	% ^{Footnote Reference**}
Consumer Discretionary	9.19%
Consumer Staples	4.35%
Energy	6.10%
Financials	18.30%
Health Care	8.61%
Industrials	24.85%
Information Technology	18.67%
Materials	4.77%
Real Estate	1.52%
Utilities	3.03%
Repurchase Agreements	0.61%
Total	100.00%

Footnote	Description
Footnote*	A sector may comprise several industries.
Footnote**	Represents percent of total investments, which excludes derivatives.

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