Income Taxes - Schedule of Significant Components of Deferred Income Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Inventories	$ 7.8	$ 5.8
Deferred Compensation	4.3	4.0
Provisions	11.1	14.3
Liabilities including leases liabilities	34.0	42.5
Loss carryforwards	59.5	54.0
Interest carryforwards	5.5	5.6
Tax credits	26.2	21.0
Other	11.2	2.6
Total deferred tax assets	159.6	149.8
Valuation allowances	(67.3)	(50.5)	$ (40.1)	$ (38.1)
Net deferred tax assets	92.3	99.3
Deferred Tax Liabilities
Intangible assets	1.4	1.4
Property, plant and equipment including right of use assets	77.3	92.0
Financial assets	8.0	13.7
Receivables, other assets	13.1	7.1
Total deferred tax liabilities	99.8	114.2
Net deferred tax assets / (liabilities)	(7.5)	(14.9)
Deferred income tax assets	20.5	21.6
Deferred income tax liabilities	$ 28.0	$ 36.5