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Accounting for Suspended Exploratory Wells - Aging of Costs on a Well and Project Basis (Details) $ in Millions	Dec. 31, 2024 USD ($) well project	Dec. 31, 2023 USD ($) project	Dec. 31, 2022 USD ($) project
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 1,645	$ 1,570	$ 1,554
Number of wells | well	75
Number of projects | project	14	13	12
2000-2009
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 263
Number of wells | well	14
2010-2014
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 1,122
Number of wells | well	49
2015-2023
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 260
Number of wells | well	12
2008-2012
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 292
Number of projects | project	2
2013-2016
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 1,082
Number of projects | project	6
2017-2024
Oil and Gas, Capitalized Exploratory Well Cost, Capitalized for Period Greater than One Year, Aging [Line Items]
Amount	$ 271
Number of projects | project	6

X

- 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

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

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- Definition

Number of projects for 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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ 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

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