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Accounting for Suspended Exploratory Wells - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
project
well
Dec. 31, 2023
USD ($)
project
Dec. 31, 2022
USD ($)
project
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]      
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ $ 1,645 $ 1,570 $ 1,554
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 14 13 12
Expected period for decision on the recognition of proved reserves 5 years    
Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells | well 75    
Drilling Activity      
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]      
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ $ 847    
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 7    
No Drilling Activity      
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]      
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ $ 798    
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 7    
Undergoing Front End Engineering and Design with Final Investment Decision Expected      
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]      
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ $ 383    
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 5    
Undergoing front-end engineering and design with final investment decision expected in three years 4 years    
Reviewing Development Alternatives      
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]      
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ $ 415    
Number of projects with exploratory well costs that have been capitalized for a period greater than one year (in projects) | project 2