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Information on Business Segments (Assets by Segment) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Assets		$ 2,788.6	$ 2,786.4
Operating Segments
Segment Reporting Information [Line Items]
Assets		1,045.4	1,074.1
Unallocated Assets
Segment Reporting Information [Line Items]
Assets		1,742.3	1,711.0
Corporate
Segment Reporting Information [Line Items]
Assets	[1]	0.9	1.3
ACCO Brands North America | Operating Segments
Segment Reporting Information [Line Items]
Assets	[1]	403.4	456.1
ACCO Brands EMEA | Operating Segments
Segment Reporting Information [Line Items]
Assets	[1]	257.9	276.7
ACCO Brands International | Operating Segments
Segment Reporting Information [Line Items]
Assets	[1]	$ 384.1	$ 341.3
[1] Represents total assets, excluding goodwill and identifiable intangibles resulting from business acquisitions, intercompany balances, cash, deferred taxes, derivatives, prepaid pension assets, prepaid debt issuance costs and right of use asset, leases.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910

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+ References

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