Description of the Plan - Additional Information (Details) - EBP 002	12 Months Ended
Dec. 31, 2026 USD ($)	Dec. 31, 2025 USD ($) Age
EBP, Description of Plan [Line Items]
Employee benefit plan, description		true
Participant pre-tax basis of eligible compensation amount		$ 23,500
Participant pre-tax basis maximum of eligible compensation		50.00%
Deferral rate of eligible compensation		25.00%
Vesting percentage		100.00%
Participant contribution minimum age for catch-up contributions \| Age		50
Participant contribution pre-tax annual catch-up compensation amount		$ 7,500
Participant contribution minimum age for super catch-up contributions \| Age		60
Participant contribution maximum age for super catch-up contributions \| Age		63
After-tax contributions and catch-up contributions maximum percentage of eligible compensation		75.00%
Employee benefit plan employer contribution percentage		100.00%
Employee benefit plan employer contribution participant compensation percentage		6.00%
Note receivable from participant, account, maximum borrowing, amount		$ 50,000
Note receivable from participant, account, set up fee		50
Forecast
EBP, Description of Plan [Line Items]
Deferral rate of eligible compensation	150.00%
Participant contribution pre-tax annual catch-up compensation amount	$ 10,000
Principal Residence Loan
EBP, Description of Plan [Line Items]
Note receivable from participant, account, minimum borrowing, amount		1,000
General Purpose Loan
EBP, Description of Plan [Line Items]
Note receivable from participant, account, minimum borrowing, amount		$ 500
T. Rowe Price Retirement Fund
EBP, Description of Plan [Line Items]
Participant pre-tax basis maximum of eligible compensation		6.00%

EBP, Employer Contribution, Vesting Percentage.

No definition available.

Name:	acco_EBPEmployerContributionVestingPercentage
Namespace Prefix:	acco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan, after-tax contributions and catch-up contributions maximum percentage of eligible compensation.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanAfter-TaxContributionsAndCatch-UpContributionsMaximumPercentageOfEligibleCompensation
Namespace Prefix:	acco_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan note receivable from participant one time loan set up fee.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanNoteReceivableFromParticipantOneTimeLoanSetUpFee
Namespace Prefix:	acco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Employee Benefit Plan Participant Contribution Maximum Age For Super Catch-Up Contributions.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanParticipantContributionMaximumAgeForSuperCatch-UpContributions
Namespace Prefix:	acco_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan Participant Contribution Minimum Age For Catch-Up Contributions.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanParticipantContributionMinimumAgeForCatch-UpContributions
Namespace Prefix:	acco_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan Participant Contribution Minimum Age For Super Catch-Up Contributions.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanParticipantContributionMinimumAgeForSuperCatch-UpContributions
Namespace Prefix:	acco_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee Benefit Plan, Participant Contribution Pre-tax Maximum Annual Catch-Up Compensation Amount.

+ References

No definition available.

+ Details

Name:	acco_EmployeeBenefitPlanParticipantContributionPre-TaxMaximumAnnualCatch-UpCompensationAmount
Namespace Prefix:	acco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Indicates (true false) whether description of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) is published and made available.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionAvailable
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:booleanItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of minimum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMinimumBorrowingAmount
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_DebtInstrumentAxis=acco_PrincipalResidenceLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=acco_GeneralPurposeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap-ebp_EmployeeBenefitPlanContributionParticipatingEmployerAxis=acco_TRowePriceRetirementFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: