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Disposal related costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on held-for-sale asset group	$ 0.0	$ 6.1	$ 0.0
Loss on held-for-sale asset group	(1.9)	(9.8)	0.0
Total disposal related costs	(2.0)	(12.2)	0.0
Graphic Arts
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on held-for-sale asset group		(9.8)	0.0
Disposal related costs	(0.1)	(2.4)	0.0
Total disposal related costs	$ (2.0)	$ (12.2)	$ 0.0

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- Definition

Disposal Group, Not Discontinued Operation, Disposal Cost

+ References

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- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount, before tax, of (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a disposal group. Excludes discontinued operations.

+ References

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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.

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