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Derivative Instruments - Effect of Derivative Instruments on the Consolidated Statement of Operations (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Derivative [Line Items]      
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense)    
Total $ (3) $ 230 $ (463)
Gas contracts      
Derivative [Line Items]      
Cash received (paid) on settlement of derivative instruments 96 280 (438)
Non-cash gain (loss) on derivative instruments (80) (72) 149
Oil contracts      
Derivative [Line Items]      
Cash received (paid) on settlement of derivative instruments 2 4 (324)
Non-cash gain (loss) on derivative instruments $ (21) $ 18 $ 150