Information on Business Segments (Assets by Segment) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets		$ 1,953.4	$ 2,215.1
Corporate
Segment Reporting Information [Line Items]
Assets	[1]	1.1	1.4
Total segment assets
Segment Reporting Information [Line Items]
Assets		810.3	925.8
ACCO Brands North America
Segment Reporting Information [Line Items]
Assets	[1]	413.8	433.7
ACCO Brands International
Segment Reporting Information [Line Items]
Assets	[1]	335.0	429.7
Computer Products Group
Segment Reporting Information [Line Items]
Assets	[1]	61.5	62.4
Unallocated Assets
Segment Reporting Information [Line Items]
Assets		$ 1,142.0	$ 1,287.9

[1] Represents total assets, excluding: goodwill and identifiable intangibles resulting from business acquisitions, intercompany balances, cash, deferred taxes, prepaid pension assets, prepaid debt issuance costs and joint ventures accounted for on an equity basis.