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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% |  |  |  |  |

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- Definition 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 -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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- Definition 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 -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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