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Goodwill and Identifiable Intangible Assets - Narrative (Details) |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Aug. 31, 2022 USD ($) | May 31, 2022 USD ($) | Sep. 30, 2022 USD ($) Reportingunit | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) Reportingunit | Sep. 30, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Number of reporting units | Reportingunit |  |  | 3 |  | 3 |
Goodwill impairment | $ 98,700,000 |  | $ 98,700,000 | $ 0 | $ 98,700,000 | $ 0
Goodwill, accumulated impairment losses |  | $ 0 |  |  |  |
Amortization of intangibles |  |  | $ 9,900,000 | $ 11,600,000 | 31,500,000 | $ 35,200,000
Impairment of indefinite-lived trade names |  | $ 0 |  |  |  |
ACCO Brands North America |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill impairment |  |  |  |  | 98,700,000 |
ACCO Brands International |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill impairment |  |  |  |  | $ 0 |
Leitz Indefinite-lived Trade Name [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill, accumulated impairment losses | $ 0 |  |  |  |  |
Leitz Indefinite-lived Trade Name [Member] | Maximum |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Percentage of excess fair value over carrying value | 10.00% |  |  |  |  |

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