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Accounting for Suspended Exploratory Wells - Aging of Costs on a Well and Project Basis (Details) $ in Millions | Dec. 31, 2023 USD ($) Well Project | Dec. 31, 2022 USD ($) Project | Dec. 31, 2021 USD ($) Project
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Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 1,570 | $ 1,554 | $ 2,044
Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells | Well | 71 |  |
Number of projects (in projects) | Project | 13 | 12 | 15
2000-2009 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 263 |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells | Well | 14 |  |
2010-2014 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 1,121 |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells | Well | 49 |  |
2015-2022 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 186 |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year, number of wells | Well | 8 |  |
2008-2012 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 292 |  |
Number of projects (in projects) | Project | 2 |  |
2013-2016 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 1,082 |  |
Number of projects (in projects) | Project | 6 |  |
2017-2023 |  |  |
Projects with Exploratory Well Costs Capitalized for More than One Year [Line Items] |  |  |
Capitalized exploratory well costs that have been capitalized for period greater than one year | $ 196 |  |
Number of projects (in projects) | Project | 5 |  |

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- Definition Exploratory Wells That Have Been Capitalized For Period Greater Than One Year, Number Of Wells With Multiple Completions, Gross + References No definition available. + Details
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- Definition The amount of exploratory well costs that have been capitalized for a period of greater than one year after the completion of drilling. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph b -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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- Definition The number of projects for which exploratory well costs have been capitalized for a period of greater than one year after the completion of drilling. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph b -Publisher FASB -URI https://asc.fasb.org//1943274/2147482274/932-235-50-1B + Details
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