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Goodwill and Identifiable Intangible Assets - Narrative (Details)		3 Months Ended		6 Months Ended
	May 31, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Reportingunit	Jun. 30, 2021 USD ($)	Dec. 31, 2016 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units | Reportingunit				3
Goodwill, accumulated impairment losses	$ 0					$ 215,100,000
Amortization of intangibles		$ 10,500,000	$ 11,600,000	$ 21,600,000	$ 23,600,000
Impairment of indefinite-lived trade names	$ 0
Maximum | ACCO Brands North America
Finite-Lived Intangible Assets [Line Items]
Percentage of excess fair value over carrying value	10.00%
Maximum | ACCO Brands International
Finite-Lived Intangible Assets [Line Items]
Percentage of excess fair value over carrying value	10.00%

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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