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Information on Operating Segments - Depreciation Expense by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Segment Reporting Information [Line Items] |  |  |  |
Total depreciation | $ 4.1 | $ 6.6 | $ 9.5 | $ 13.3
ACCO Brands Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total depreciation | 3.0 | 4.2 | 6.0 | 8.7
ACCO Brands International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total depreciation | $ 1.1 | $ 2.4 | $ 3.5 | $ 4.6

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