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Suspended Wells and Exploration Expenses - Aging of Exploratory Well Cost, Capitalized for More than One Year (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year $ 184 $ 512 $ 656
2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 57    
2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 102    
2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 25    
WL4-00 - Malaysia      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 36    
WL4-00 - Malaysia | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 19    
WL4-00 - Malaysia | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 17    
WL4-00 - Malaysia | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
PL 891 - Norway      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 30    
PL 891 - Norway | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 30    
PL 891 - Norway | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
PL 891 - Norway | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
West Willow - Alaska      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 29    
West Willow - Alaska | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
West Willow - Alaska | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 29    
West Willow - Alaska | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
Narwhal Trend - Alaska      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 25    
Narwhal Trend - Alaska | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
Narwhal Trend - Alaska | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 25    
Narwhal Trend - Alaska | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
PL782S - Norway      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 19    
PL782S - Norway | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
PL782S - Norway | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 19    
PL782S - Norway | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
Montney - Canada      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 16    
Montney - Canada | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 8    
Montney - Canada | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 8    
Montney - Canada | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
Other of $10 Million or less each      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 29    
Other of $10 Million or less each | 2020-2022      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 0    
Other of $10 Million or less each | 2017-2019      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year 4    
Other of $10 Million or less each | 2006-2016      
Capitalized Exploratory Well Costs [Line Items]      
Exploratory well costs capitalized for a period greater than one year $ 25