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Goodwill and Identifiable Intangible Assets - Summary of Changes in Net Carrying Amount Goodwill By Segment (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Aug. 31, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Goodwill [Roll Forward]
Balance at December 31, 2021				$ 802.5
Goodwill impairment	$ (98.7)	$ (98.7)	$ 0.0	(98.7)	$ 0.0
Foreign currency translation				(36.9)
Balance at June 30, 2022		666.9		666.9
ACCO Brands North America
Goodwill [Roll Forward]
Balance at December 31, 2021				446.7
Goodwill impairment				(98.7)
Foreign currency translation				0.0
Balance at June 30, 2022		348.0		348.0
ACCO Brands EMEA
Goodwill [Roll Forward]
Balance at December 31, 2021				178.6
Goodwill impairment				0.0
Foreign currency translation				(37.2)
Balance at June 30, 2022		141.4		141.4
ACCO Brands International
Goodwill [Roll Forward]
Balance at December 31, 2021				177.2
Goodwill impairment				0.0
Foreign currency translation				0.3
Balance at June 30, 2022		$ 177.5		$ 177.5

X

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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