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Goodwill And Identifiable Intangibles (Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2016
Goodwill [Roll Forward]
Balance at December 31, 2018	$ 708.9
Translation	(1.7)
Balance at March 31, 2019	706.9
Goodwill, accumulated impairment losses		$ 215.1
ACCO Brands North America
Goodwill [Roll Forward]
Balance at December 31, 2018	375.6
Translation	0.0
Balance at March 31, 2019	375.6
ACCO Brands EMEA
Goodwill [Roll Forward]
Balance at December 31, 2018	165.6
Translation	(1.7)
Balance at March 31, 2019	163.9
ACCO Brands International
Goodwill [Roll Forward]
Balance at December 31, 2018	167.7
Translation	0.0
Balance at March 31, 2019	167.4
GOBA Internacional, SA de CV
Goodwill [Roll Forward]
GOBA Acquisition	(0.3)
GOBA Internacional, SA de CV | ACCO Brands North America
Goodwill [Roll Forward]
GOBA Acquisition	0.0
GOBA Internacional, SA de CV | ACCO Brands EMEA
Goodwill [Roll Forward]
GOBA Acquisition	0.0
GOBA Internacional, SA de CV | ACCO Brands International
Goodwill [Roll Forward]
GOBA Acquisition	$ (0.3)

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.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

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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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the 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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