v3.26.3
Hedging Activities and Fair Value Measurements - Schedule of Recurring Fair Value Measurements (Details) - Fair Value, Recurring - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Commodity derivatives:    
Impact of CME Rule 814 $ (866) $ (489)
Total commodity derivatives 760 460
Total 760 460
Commodity derivatives:    
Impact of CME Rule 814 (1,056) (379)
Total commodity derivatives 748 363
Total 748 363
Commodity Derivative Before CME Rule 814    
Commodity derivatives:    
Total commodity derivatives 1,626 949
Commodity derivatives:    
Total commodity derivatives 1,804 742
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)    
Commodity derivatives:    
Impact of CME Rule 814 (121) (170)
Total commodity derivatives 66 2
Total 66 2
Commodity derivatives:    
Impact of CME Rule 814 (487) (31)
Total commodity derivatives 53 1
Total 53 1
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Commodity Derivative Before CME Rule 814    
Commodity derivatives:    
Total commodity derivatives 187 172
Commodity derivatives:    
Total commodity derivatives 540 32
Significant Other Observable Inputs (Level 2)    
Commodity derivatives:    
Impact of CME Rule 814 (745) (319)
Total commodity derivatives 694 458
Total 694 458
Commodity derivatives:    
Impact of CME Rule 814 (569) (348)
Total commodity derivatives 695 362
Total 695 362
Significant Other Observable Inputs (Level 2) | Commodity Derivative Before CME Rule 814    
Commodity derivatives:    
Total commodity derivatives 1,439 777
Commodity derivatives:    
Total commodity derivatives 1,264 710
Significant Unobservable Inputs (Level 3)    
Commodity derivatives:    
Impact of CME Rule 814 0 0
Total commodity derivatives 0 0
Total 0 0
Commodity derivatives:    
Impact of CME Rule 814 0 0
Total commodity derivatives 0 0
Total 0 0
Significant Unobservable Inputs (Level 3) | Commodity Derivative Before CME Rule 814    
Commodity derivatives:    
Total commodity derivatives 0 0
Commodity derivatives:    
Total commodity derivatives $ 0 $ 0