Financial Instruments and Risk Management - Fair Value of Hedging Contracts (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets:
Total assets	$ 0.2	$ 1.2
Liabilities:
Total liabilities	1.2	0.2
Level 1
Assets:
Total assets	0.0	0.0
Liabilities:
Total liabilities	0.0	0.0
Level 2
Assets:
Total assets	0.2	1.2
Liabilities:
Total liabilities	1.2	0.2
Level 3
Assets:
Total assets	0.0	0.0
Liabilities:
Total liabilities	0.0	0.0
Natural gas contracts
Assets:
Total assets		0.4
Liabilities:
Total liabilities	0.5	0.1
Natural gas contracts | Level 1
Assets:
Total assets		0.0
Liabilities:
Total liabilities	0.0	0.0
Natural gas contracts | Level 2
Assets:
Total assets		0.4
Liabilities:
Total liabilities	0.5	0.1
Natural gas contracts | Level 3
Assets:
Total assets		0.0
Liabilities:
Total liabilities	0.0	0.0
Currency exchange contracts
Assets:
Total assets	0.2	0.2
Liabilities:
Total liabilities	0.5	0.1
Currency exchange contracts | Level 1
Assets:
Total assets	0.0	0.0
Liabilities:
Total liabilities	0.0	0.0
Currency exchange contracts | Level 2
Assets:
Total assets	0.2	0.2
Liabilities:
Total liabilities	0.5	0.1
Currency exchange contracts | Level 3
Assets:
Total assets	0.0	0.0
Liabilities:
Total liabilities	0.0	0.0
Interest rate swap contracts
Assets:
Total assets		0.6
Liabilities:
Total liabilities	0.2
Interest rate swap contracts | Level 1
Assets:
Total assets		0.0
Liabilities:
Total liabilities	0.0
Interest rate swap contracts | Level 2
Assets:
Total assets		0.6
Liabilities:
Total liabilities	0.2
Interest rate swap contracts | Level 3
Assets:
Total assets		$ 0.0
Liabilities:
Total liabilities	$ 0.0