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Goodwill and Identifiable Intangible Assets - Summary of Changes in Net Carrying Amount Goodwill By Segment (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Goodwill [Roll Forward] |  |  |  |
Beginning balance | $ 671,500,000 | $ 671,500,000 | $ 802,500,000 |
Goodwill impairment | 0 | (89,500,000) | (98,700,000) | $ 0
Foreign currency translation |  | 8,000,000 | (32,300,000) |
Ending balance |  | 590,000,000 | 671,500,000 | 802,500,000
ACCO Brands North America |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance | 348,000,000 | 348,000,000 | 446,700,000 |
Goodwill impairment |  | (89,500,000) | (98,700,000) |
Foreign currency translation |  | 0 | 0 |
Ending balance |  | 258,500,000 | 348,000,000 | 446,700,000
ACCO Brands EMEA |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance | 145,600,000 | 145,600,000 | 178,600,000 |
Goodwill impairment |  | 0 | 0 |
Foreign currency translation |  | 6,700,000 | (33,000,000) |
Ending balance |  | 152,300,000 | 145,600,000 | 178,600,000
ACCO Brands International |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Beginning balance | $ 177,900,000 | 177,900,000 | 177,200,000 |
Goodwill impairment |  | 0 | 0 |
Foreign currency translation |  | 1,300,000 | 700,000 |
Ending balance |  | $ 179,200,000 | $ 177,900,000 | $ 177,200,000

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