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Supplemental Information on Oil and Gas Operations (Unaudited) (Results Of Operations) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
$ / Boe
Dec. 31, 2023
USD ($)
$ / Boe
Dec. 31, 2022
USD ($)
$ / Boe
Oil and Gas Disclosure [Abstract]      
Oil, gas and NGL sales $ 11,176 $ 10,791 $ 14,082
Production expenses (3,183) (2,928) (2,797)
Exploration expenses (28) (20) (29)
Depreciation, depletion and amortization (3,156) (2,464) (2,119)
Asset dispositions (15) (33) 43
Accretion of asset retirement obligations (39) (29) (25)
Income tax expense (972) (1,044) (2,041)
Results of operations $ 3,783 $ 4,273 $ 7,114
Depreciation, depletion and amortization per Boe | $ / Boe 11.7 10.27 9.52