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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, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | $ 133 | $ 163 | $ 184
2021-2024 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 11 |  |
2018-2020 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 94 |  |
2017 and Prior |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 28 |  |
PL 891 - Norway |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 31 |  |
PL 891 - Norway | 2021-2024 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
PL 891 - Norway | 2018-2020 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 31 |  |
PL 891 - Norway | 2017 and Prior |  |  |
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 | 30 |  |
West Willow - Alaska | 2021-2024 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
West Willow - Alaska | 2018-2020 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 30 |  |
West Willow - Alaska | 2017 and Prior |  |  |
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 | 2021-2024 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 0 |  |
Narwhal Trend - Alaska | 2018-2020 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 25 |  |
Narwhal Trend - Alaska | 2017 and Prior |  |  |
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 | 15 |  |
Montney - Canada | 2021-2024 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 7 |  |
Montney - Canada | 2018-2020 |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | 8 |  |
Montney - Canada | 2017 and Prior |  |  |
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 | 32 |  |
Other of $10 Million or less each | 2021-2024 |  |  |
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 | 2018-2020 |  |  |
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 and Prior |  |  |
Capitalized Exploratory Well Costs [Line Items] |  |  |
Exploratory well costs capitalized for a period greater than one year | $ 28 |  |

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- Definition Amount of exploratory well cost capitalized for period of greater than one year after completion of drilling in oil- and gas-producing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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