v3.26.1
Fair Value Measurement - Schedule of Fair Value Hierarchy for Gross Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities $ 1,613 $ 1,601
Commodity derivatives 1,302 604
Total assets 2,915 2,205
Commodity derivatives 1,233 538
Total liabilities 1,233 538
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 258 270
Commodity derivatives 901 306
Total assets 1,159 576
Commodity derivatives 963 354
Total liabilities 963 354
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 1,355 1,331
Commodity derivatives 332 230
Total assets 1,687 1,561
Commodity derivatives 137 124
Total liabilities 137 124
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments in debt securities 0 0
Commodity derivatives 69 68
Total assets 69 68
Commodity derivatives 133 60
Total liabilities $ 133 $ 60