v3.26.3
Fair Value Measurement - Schedule of Net Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financial Assets [Abstract]    
Investments in debt securities $ 1,597 $ 1,601
Carrying Amount    
Financial Assets [Abstract]    
Investments in debt securities 1,597 1,601
Financial Liabilities [Abstract]    
Total debt, excluding finance leases 22,546 22,643
Carrying Amount | Commodity Contract    
Financial Assets [Abstract]    
Commodity derivatives 392 237
Financial Liabilities [Abstract]    
Commodity derivatives 253 124
Estimate of Fair Value Measurement    
Financial Assets [Abstract]    
Investments in debt securities 1,597 1,601
Financial Liabilities [Abstract]    
Total debt, excluding finance leases 21,327 22,698
Estimate of Fair Value Measurement | Commodity Contract    
Financial Assets [Abstract]    
Commodity derivatives 392 237
Financial Liabilities [Abstract]    
Commodity derivatives $ 253 $ 124