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Accounting for Suspended Exploratory Wells - Summary of Changes and Aging of Capitalized Well Costs (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
project
Dec. 31, 2023
USD ($)
project
Dec. 31, 2022
USD ($)
project
Changes in company's suspended exploratory well costs      
Beginning balance $ 1,648 $ 1,627 $ 2,109
Additions to capitalized exploratory well costs pending the determination of proved reserves 14 88 72
Reclassifications to wells, facilities and equipment based on the determination of proved reserves 0 0 (481)
Capitalized exploratory well costs charged to expense 0 (67) (73)
Ending balance 1,662 1,648 1,627
Aging of capitalized well costs and number of project      
Exploratory well costs capitalized for a period of one year or less 17 78 73
Exploratory well costs capitalized for a period greater than one year 1,645 1,570 1,554
Capitalized exploratory well costs, total $ 1,662 $ 1,648 $ 1,627
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 14 13 12