Revenue Reccognition (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 405.8	$ 359.8
Product and Services transferred at a point in time
Disaggregation of Revenue [Line Items]
Net sales	391.4
Product and Services transferred over time
Disaggregation of Revenue [Line Items]
Net sales	14.4
ACCO Brands North America
Disaggregation of Revenue [Line Items]
Net sales	165.6	174.9
ACCO Brands North America | United States
Disaggregation of Revenue [Line Items]
Net sales	144.4	154.7
ACCO Brands North America | Canada
Disaggregation of Revenue [Line Items]
Net sales	21.2	20.2
ACCO Brands EMEA
Disaggregation of Revenue [Line Items]
Net sales	154.5	96.5
ACCO Brands International
Disaggregation of Revenue [Line Items]
Net sales	85.7	88.4
ACCO Brands International | Australia/N.Z.
Disaggregation of Revenue [Line Items]
Net sales	39.8	43.2
ACCO Brands International | Latin America
Disaggregation of Revenue [Line Items]
Net sales	33.5	33.2
ACCO Brands International | Asia-Pacific
Disaggregation of Revenue [Line Items]
Net sales	$ 12.4	$ 12.0