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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, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | $ 512 | $ 656 | $ 526
2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 308 |  |
2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 174 |  |
2006-2015 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 30 |  |
Willow - Alaska |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 315 |  |
Willow - Alaska | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 201 |  |
Willow - Alaska | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 114 |  |
Willow - Alaska | 2006-2015 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
PL 1009 - Norway |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 39 |  |
PL 1009 - Norway | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 39 |  |
PL 1009 - Norway | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
PL 1009 - Norway | 2006-2015 |  |  |
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 | 31 |  |
PL 891 - Norway | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 31 |  |
PL 891 - Norway | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
PL 891 - Norway | 2006-2015 |  |  |
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 | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
Narwhal Trend - Alaska | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 25 |  |
Narwhal Trend - Alaska | 2006-2015 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
WL4-00 - Malaysia |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 24 |  |
WL4-00 - Malaysia | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 7 |  |
WL4-00 - Malaysia | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 17 |  |
WL4-00 - Malaysia | 2006-2015 |  |  |
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 | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 19 |  |
PL782S - Norway | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
PL782S - Norway | 2006-2015 |  |  |
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 | 12 |  |
Montney - Canada | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 4 |  |
Montney - Canada | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 8 |  |
Montney - Canada | 2006-2015 |  |  |
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 | 47 |  |
Other of $10 Million or less each | 2019-2021 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 7 |  |
Other of $10 Million or less each | 2016-2018 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 10 |  |
Other of $10 Million or less each | 2006-2015 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | $ 30 |  |

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