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Asset Retirement Obligation - Schedule of Change in Asset Retirement Obligation (Details)
$ in Millions
9 Months Ended
Sep. 30, 2025
USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]  
As of December 31, 2024 $ 33.9
Accretion expense 2.1
Additions 0.2
Liabilities settled (2.2)
As of September 30, 2025 $ 34.0