Information on Business Segments (Capital Spend by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total capital spend	$ 34.1	$ 31.0	$ 18.5
ACCO Brands North America
Segment Reporting Information [Line Items]
Total capital spend	24.3	16.3	10.3
ACCO Brands EMEA
Segment Reporting Information [Line Items]
Total capital spend	6.1	5.1	2.9
ACCO Brands International
Segment Reporting Information [Line Items]
Total capital spend	$ 3.7	$ 9.6	$ 5.3