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Fair Value Measurement - Net Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Carrying Amount    
Financial assets    
Commodity derivatives $ 210 $ 345
Investments in debt securities 1,551 1,424
Financial liabilities    
Total debt, excluding finance leases 23,384 17,808
Carrying Amount | Commodity    
Financial liabilities    
Commodity derivatives 129 225
Fair Value    
Financial assets    
Commodity derivatives 210 345
Investments in debt securities 1,551 1,424
Financial liabilities    
Total debt, excluding finance leases 22,997 18,621
Fair Value | Commodity    
Financial liabilities    
Commodity derivatives $ 129 $ 225