Revenue Recognition (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 498.8	$ 490.0	$ 904.6	$ 849.8
Product and Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	485.8		878.7
Product and Services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	13.0		25.9
ACCO Brands North America
Disaggregation of Revenue [Line Items]
Net sales	282.8	280.6	448.4	455.5
ACCO Brands North America | United States
Disaggregation of Revenue [Line Items]
Net sales	245.7	247.6	390.1	402.3
ACCO Brands North America | Canada
Disaggregation of Revenue [Line Items]
Net sales	37.1	33.0	58.3	53.2
ACCO Brands EMEA
Disaggregation of Revenue [Line Items]
Net sales	140.5	128.5	295.0	225.0
ACCO Brands International
Disaggregation of Revenue [Line Items]
Net sales	75.5	80.9	161.2	169.3
ACCO Brands International | Australia/N.Z.
Disaggregation of Revenue [Line Items]
Net sales	37.6	40.7	77.4	83.9
ACCO Brands International | Latin America
Disaggregation of Revenue [Line Items]
Net sales	25.6	28.7	59.1	61.9
ACCO Brands International | Asia-Pacific
Disaggregation of Revenue [Line Items]
Net sales	$ 12.3	$ 11.5	$ 24.7	$ 23.5