Goodwill And Identifiable Intangibles (Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2016
Goodwill [Roll Forward]
Balance at December 31, 2015	$ 496.9
Translation	11.2
Balance at March 31, 2016	508.1
Goodwill, Impaired, Accumulated Impairment Loss
Goodwill			$ 723.2
Accumulated impairment losses			(215.1)
Balance at March 31, 2016	496.9		508.1
Balance at March 31, 2016	(401.9)
Goodwill, Impairment Loss		$ 0.0
ACCO Brands North America
Goodwill [Roll Forward]
Balance at December 31, 2015	377.5
Translation	3.6
Balance at March 31, 2016	381.1
Goodwill, Impaired, Accumulated Impairment Loss
Goodwill			512.0
Accumulated impairment losses			(130.9)
Balance at March 31, 2016	377.5		381.1
ACCO Brands International
Goodwill [Roll Forward]
Balance at December 31, 2015	112.6
Translation	7.6
Balance at March 31, 2016	120.2
Goodwill, Impaired, Accumulated Impairment Loss
Goodwill			204.4
Accumulated impairment losses			(84.2)
Balance at March 31, 2016	112.6		120.2
Computer Products Group
Goodwill [Roll Forward]
Balance at December 31, 2015	6.8
Translation	0.0
Balance at March 31, 2016	6.8
Goodwill, Impaired, Accumulated Impairment Loss
Goodwill			6.8
Accumulated impairment losses			0.0
Balance at March 31, 2016	$ 6.8		$ 6.8