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Information on Operating Segments - Capital Spend by Segment (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Segment Reporting Information [Line Items] |  |
Total capital spend | $ 13.6 | $ 17.0
ACCO Brands Americas |  |
Segment Reporting Information [Line Items] |  |
Total capital spend | 10.0 | 10.2
ACCO Brands International |  |
Segment Reporting Information [Line Items] |  |
Total capital spend | $ 3.6 | $ 6.8

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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