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Equity Method Investment in ARO - Schedule of Related Parties (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Jun. 30, 2024
Schedule of Equity Method Investments [Line Items]            
    Accounts receivable, net $ 513.7   $ 513.7   $ 571.2  
Contract with Customer, Liability 136.8   136.8   158.6  
Accounts payable - trade 327.1   327.1   328.5  
Carrying value 314.7   314.7   296.2  
Paid-in-Kind Interest         24.6  
ARO            
Schedule of Equity Method Investments [Line Items]            
    Accounts receivable, net 18.7   18.7   16.5  
Contract with Customer, Liability 12.2   12.2   14.1  
Accounts payable - trade 59.7   59.7   43.1  
Principal amount 376.6   376.6   376.6  
Discount (61.9)   (61.9)   (80.4)  
Carrying value 314.7   314.7   296.2  
Interest receivable 18.0   18.0   $ 0.0  
Interest income 10.0 $ 6.2 18.0 $ 18.4    
Accretion of Discount on the Notes Receivable 6.2 6.2 18.5 33.8    
Total interest income on the Notes Receivable from ARO $ 16.2 $ 12.4 $ 36.5 52.2    
ARO | Net Settlement Agreement            
Schedule of Equity Method Investments [Line Items]            
Accounts payable - trade           $ 50.7
Accretion of Discount on the Notes Receivable       $ 13.9