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Suspended Wells and Exploration Expenses - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) well | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Dry hole expense | $ 40 |  |
Exploratory well costs capitalized for a period greater than one year | 133 | $ 163 | $ 184
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs | 407 | $ 355 | 398
Asia Pacific |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Dry hole expense | 80 |  |
Exploratory well costs capitalized for a period greater than one year | 36 |  |
Alvheim, Norwegian Sector of the North Sea |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Dry hole expense | $ 22 |  |
Number of partner operating exploration wells | well | 2 |  |
PL782S - Norway |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Dry hole expense | $ 18 |  |
Norwegian Warka PL1009 |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs |  |  | 37
Alaska Bear-1 |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Before-tax impairment related to the associated carrying value of capitalized undeveloped leasehold costs |  |  | $ 31
Certain Lower 48 Offshore Interests |  |  |
Impaired Assets to be Disposed of by Method Other than Sale [Line Items] |  |  |
Increase in capitalized costs | $ (30) |  |

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- Definition Amount of increase (decrease) in capitalized exploratory well costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
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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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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-28 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 23 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-23 + Details
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