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Held-for-sale assets and liabilities - Schedule Of Proceeds Of Held-for-Sale Assets and Liabilities (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Jul. 02, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Net loss on disposal | $ 0.0 | $ 6.1 | $ 0.0 |
Held-for-sale | Graphic Arts |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gross consideration |  |  |  | $ 7.3
Working capital adjustment | (2.3) |  |  |
Transaction costs | (2.1) |  |  |
Net proceeds | 2.9 |  |  |
Net assets disposed |  |  |  | $ (4.6)
Accrued transaction costs | (0.2) |  |  |
Net loss on disposal | $ (1.9) |  |  |

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