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Restructuring (Restructuring Charges) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 12.0	$ 11.7	$ 21.7
Operating Segments | ACCO Brands North America
Restructuring Cost and Reserve [Line Items]
Restructuring charges	5.6	6.2	5.5
Operating Segments | ACCO Brands EMEA
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.3	4.9	11.2
Operating Segments | ACCO Brands International
Restructuring Cost and Reserve [Line Items]
Restructuring charges	2.7	0.6	5.0
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1.4	0.0	0.0
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	10.9	8.3	18.2
Termination of lease agreements
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0.5	3.2	2.4
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0.6	$ 0.2	$ 1.1

X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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