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Significant Accounting Policies and Recent Accounting Developments - Maintenance Costs (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Capitalized shutdown costs $ 14 $ 34
Minimum    
Property, Plant and Equipment [Line Items]    
Capitalized shutdown costs, amortization period 1 year  
Maximum    
Property, Plant and Equipment [Line Items]    
Capitalized shutdown costs, amortization period 18 months