Financial Instruments and Risk Management - Effect of Cash Flow Hedge Accounting on AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Recognized in AOCI	$ (1.8)	$ 0.1	$ (1.7)	$ (0.3)
Amount of Gain (Loss) Reclassified from AOCI into Net income (loss)	(0.1)	(0.8)	(0.3)	(1.5)
Currency exchange contracts | Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Recognized in AOCI	(0.4)	0.1	(0.5)	0.1
Amount of Gain (Loss) Reclassified from AOCI into Net income (loss)	(0.2)	0.0	(0.2)	0.0
Natural gas contracts | Cost of Sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Recognized in AOCI	(1.4)	0.0	(0.4)	(0.4)
Amount of Gain (Loss) Reclassified from AOCI into Net income (loss)	0.1	(0.8)	(0.1)	(1.5)
Interest rate swap contracts | Interest Expense
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount of Gain (Loss) Recognized in AOCI	0.0	0.0	(0.8)	0.0
Amount of Gain (Loss) Reclassified from AOCI into Net income (loss)	$ 0.0	$ 0.0	$ 0.0	$ 0.0