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Goodwill and Identifiable Intangible Assets - Narrative (Details)			3 Months Ended		9 Months Ended
	Aug. 31, 2022 USD ($)	May 31, 2022 USD ($)	Sep. 30, 2022 USD ($) Reportingunit	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) Reportingunit	Sep. 30, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units \| Reportingunit			3		3
Goodwill impairment	$ 98,700,000		$ 98,700,000	$ 0	$ 98,700,000	$ 0
Goodwill, accumulated impairment losses		$ 0
Amortization of intangibles			$ 9,900,000	$ 11,600,000	31,500,000	$ 35,200,000
Impairment of indefinite-lived trade names		$ 0
ACCO Brands North America
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment					98,700,000
ACCO Brands International
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment					$ 0
Leitz Indefinite-lived Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill, accumulated impairment losses	$ 0
Leitz Indefinite-lived Trade Name [Member] \| Maximum
Finite-Lived Intangible Assets [Line Items]
Percentage of excess fair value over carrying value	10.00%