Information on Business Segments (Depreciation Expense by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total depreciation	$ 34.0	$ 35.6	$ 30.4
ACCO Brands North America
Segment Reporting Information [Line Items]
Total depreciation	15.9	17.7	19.7
ACCO Brands EMEA
Segment Reporting Information [Line Items]
Total depreciation	12.6	11.9	5.0
ACCO Brands International
Segment Reporting Information [Line Items]
Total depreciation	$ 5.5	$ 6.0	$ 5.7