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Accounting for Asset Retirement Obligations - Reconciliation of Asset Retirement Obligations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Accounting for Asset Retirement Obligations [Abstract]    
Asset retirement obligation, beginning of period $ 27.6 $ 20.8
Accretion expense 2.6 1.6
Other 3.7 6.5
Payments (6.9) (0.8)
Foreign currency translation 0.3 (0.5)
Asset retirement obligation, end of period $ 27.3 $ 27.6