Information On Business Segments (Operating Income by Segment) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Operating income	$ 61.8	[1]	$ 50.3	[1]	$ 105.1	[1]	$ 79.0	[1]
Interest expense	12.5		13.9		37.0		45.3
Interest income	(1.6)		(1.4)		(4.7)		(3.6)
Equity in earnings of joint ventures	(2.9)		(3.3)		(5.3)		(5.9)
Other expense, net	0.2		0.1		0.3		9.6
Income from continuing operations before income tax	53.6		41.0		77.8		33.6
Corporate
Segment Reporting Information [Line Items]
Operating income	(10.5)	[1],[2]	(7.0)	[1],[2]	(29.8)	[1],[2]	(24.0)	[1],[2]
Segment operating income
Segment Reporting Information [Line Items]
Operating income	72.3	[1]	57.3	[1]	134.9	[1]	103.0	[1]
ACCO Brands North America
Segment Reporting Information [Line Items]
Operating income	50.5	[1]	36.1	[1]	98.0	[1]	61.6	[1]
ACCO Brands International
Segment Reporting Information [Line Items]
Operating income	19.1	[1]	17.8	[1]	31.9	[1]	32.3	[1]
Computer Products Group
Segment Reporting Information [Line Items]
Operating income	$ 2.7	[1]	$ 3.4	[1]	$ 5.0	[1]	$ 9.1	[1]

[1] Operating income as presented in the segment table above is defined as i) net sales; ii) less cost of products sold; iii) less advertising, selling, general and administrative expenses; iv) less amortization of intangibles; and v) less restructuring charges.

[2] The increase in corporate expense was the result of various strategic initiatives and higher management incentives.