Information on Business Segments (Identifiable Intangibles and Goodwill by Segment) (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill		$ 1,953.4	$ 2,215.1
Corporate
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill	[1]	1.1	1.4
Total segment assets
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill		1,828.1	2,042.1
ACCO Brands North America
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill	[1]	1,220.7	1,272.4
ACCO Brands International
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill	[1]	531.5	692.7
Computer Products Group
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill	[1]	75.9	77.0
Unallocated Assets
Segment Reporting Information [Line Items]
Assets Including Allocation of Identifiable Intangible Assets and Goodwill		$ 124.2	$ 171.6

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