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Property, Plant and Equipment (Summary of Changes in Suspended Exploratory Well Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Property, Plant and Equipment [Abstract]      
Beginning balance $ 136 $ 126 $ 66
Additions pending determination of proved reserves 674 522 462
Charges to exploration expense (1) (1) (1)
Reclassifications to proved properties (516) (511) (401)
Ending balance $ 293 $ 136 $ 126