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Amount of deferred federal income tax expense (benefit) pertaining to undistributed earnings of foreign subsidiaries

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Amount if undistributed earnings of foreign subsidiaries not permanently reinvested outside of the country of domicile.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of interest capitalized during the period.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of expense for research and development. Includes, but is not limited to, cost for computer software product to be sold, leased, or otherwise marketed and writeoff of research and development assets acquired in transaction other than business combination or joint venture formation or both. Excludes write-down of intangible asset acquired in business combination or from joint venture formation or both, used in research and development activity.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Significant Accounting Policies, Recent Accounting Pronouncements and Adopted Accounting Standards - Narrative (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) Reportingunit Segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Accounting Policies [Line Items]
Number of operating segments \| Segment	2
Interest costs capitalized	$ 0	$ 0	$ 0
Goodwill impairment		127,500,000
Number of reporting units \| Reportingunit	2
Deferred taxes for undistributed earnings of foreign subsidiaries	$ 3,600,000
Undistributed earnings of foreign subsidiaries not permanently reinvested	313,400,000
Undistributed earnings of foreign subsidiaries	223,400,000
Advertising expenses	92,500,000	99,300,000	102,700,000
Research and development expenses	$ 22,000,000	23,000,000	$ 25,800,000
Minimum
Accounting Policies [Line Items]
Service And Maintenance Agreement Term	3 months
Maximum
Accounting Policies [Line Items]
Service And Maintenance Agreement Term	60 months
Amortizable Period, Option 1 \| Minimum
Accounting Policies [Line Items]
Intangible assets, amortizable life	5 years
Amortizable Period, Option 2 \| Maximum
Accounting Policies [Line Items]
Intangible assets, amortizable life	30 years
Buildings \| Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	40 years
Buildings \| Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	50 years
Machinery, equipment and furniture \| Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	3 years
Machinery, equipment and furniture \| Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
Computer software \| Minimum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	5 years
Computer software \| Maximum
Accounting Policies [Line Items]
Property, plant and equipment, useful life	10 years
ACCO Brands International
Accounting Policies [Line Items]
Goodwill impairment		$ 0