v3.26.1
Schedule H, Line 4(i) - Schedule of Assets (Held at End of Year) (Details) - EBP 002 [Member]
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Asset Held for Investment, Party-in-Interest [true false] true
Plan name 401(K) PLAN
Tax identification number 36-2704017
Plan number 002
Participant loans latest maturity date Jul. 31, 2035
Participant loans, current value $ 4,334,400
Current Value $ 392,200,498
Maximum [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant Loans Interest Rate 9.00%
Minimum [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant Loans Interest Rate 3.25%
Investment, Identifier [Axis]: ACCO Brands Corporation ACCO Brands Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] ACCO Brands Corporation [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:CommonStockMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,224,536
Investment, Identifier [Axis]: Columbia Columbia Small Cap Value Fund II I3  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Columbia [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 3,782,453
Investment, Identifier [Axis]: Dimensional Fund Advisors DFA Global Real Estate Securities Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Dimensional Fund Advisors [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 208,414
Investment, Identifier [Axis]: Dodge & Cox Dodge & Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Dodge & Cox [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,193,999
Investment, Identifier [Axis]: Fidelity Investments Fidelity Contrafund Class K6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 48,585,839
Investment, Identifier [Axis]: Fidelity Investments Fidelity Emerging Markets Fund Class K  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,693,679
Investment, Identifier [Axis]: Fidelity Investments Fidelity Global ex U.S. Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,837,205
Investment, Identifier [Axis]: Fidelity Investments Fidelity Government Money Market Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,575
Investment, Identifier [Axis]: Fidelity Investments Fidelity Mid Cap Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,735,594
Investment, Identifier [Axis]: Fidelity Investments Fidelity Small Cap Growth K6 Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 11,088,222
Investment, Identifier [Axis]: Fidelity Investments Fidelity Small Cap Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 789,838
Investment, Identifier [Axis]: Fidelity Investments Fidelity U.S. Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Fidelity Investments [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 2,287,282
Investment, Identifier [Axis]: Hartford Hartford Strategic Income Fund Class R6  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Hartford [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,355,217
Investment, Identifier [Axis]: Northern Trust NT S&P 500 Index  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Northern Trust [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 41,859,113
Investment, Identifier [Axis]: PIMCO PIMCO Commodity Real Return Strategy Fund Institutional Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] PIMCO [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 395,458
Investment, Identifier [Axis]: PIMCO PIMCO Total Return Fund Institutional Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] PIMCO [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 6,403,181
Investment, Identifier [Axis]: Participant Loans 3.25% - 9.00%, various maturity dates (latest maturity date July 31, 2035)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment Sold, Cost Basis [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Investment, Identifier [Axis]: Prudential Ins. Co. of America Wrapper contract #GA-62068  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Prudential Ins. Co. of America [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanSyntheticInvestmentContractMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value
Investment, Identifier [Axis]: Prudential Trust Company Core Intermediate Bond Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Prudential Trust Company [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanSyntheticInvestmentContractMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 24,904,776
Investment, Identifier [Axis]: Securities Held by Fidelity Various  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Securities Held by Fidelity [Member]
EBP, Asset Held for Investment, Party-in-Interest [true false] true
EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Self-Directed Brokerage Account [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 3,473,631
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Capital Appreciation Fund I Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 29,783,190
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2005 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,472,197
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2010 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,498,958
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2015 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 2,955,226
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2020 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 6,665,075
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2025 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 23,761,138
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2030 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 41,273,580
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2035 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 37,580,250
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2040Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 27,766,835
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2045 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 21,895,485
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2050 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 12,783,196
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2055 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 9,957,514
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement 2060 Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 5,385,154
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Retirement Balanced Trust (Class F)  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 1,958,580
Investment, Identifier [Axis]: T. Rowe Price T. Rowe Price Value Fund I Class  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] T. Rowe Price [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 3,967,048
Investment, Identifier [Axis]: Vanguard Vanguard International Growth Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
EBP, Investment, Issuer Name [Extensible Enumeration] Vanguard [Member]
EBP, Investment, Current Value, Type [Extensible Enumeration] Mutual Fund [Member]
EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Participation Status [Extensible Enumeration] us-gaap-ebp:EmployeeBenefitPlanParticipantDirectedMember
Current Value $ 6,342,660