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Goodwill And Identifiable Intangibles (Goodwill) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2016
Goodwill [Roll Forward]
Balance at December 31, 2019	$ 718.6
Acquisitions	(0.4)
Translation	(4.2)
Balance at June 30, 2020	714.0
Goodwill, accumulated impairment losses		$ 215.1
ACCO Brands North America
Goodwill [Roll Forward]
Balance at December 31, 2019	375.6
Acquisitions	0.0
Translation	0.0
Balance at June 30, 2020	375.6
ACCO Brands EMEA
Goodwill [Roll Forward]
Balance at December 31, 2019	165.7
Acquisitions	0.0
Translation	(1.5)
Balance at June 30, 2020	164.2
ACCO Brands International
Goodwill [Roll Forward]
Balance at December 31, 2019	177.3
Acquisitions	(0.4)
Translation	(2.7)
Balance at June 30, 2020	$ 174.2

X

- Definition

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

+ References

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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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