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Suspended Wells and Exploration Expenses - Aging of Suspended Well Cost (Details) $ in Millions	Dec. 31, 2022 USD ($) project	Dec. 31, 2021 USD ($) project	Dec. 31, 2020 USD ($) project	Dec. 31, 2019 USD ($)
Extractive Industries [Abstract]
Exploratory well costs capitalized for a period of one year or less	$ 15	$ 4	$ 156
Exploratory well costs capitalized for a period greater than one year	512	656	526
Capitalized cost of suspended wells	$ 527	$ 660	$ 682	$ 1,020
Number of projects with exploratory well costs capitalized for a period greater than one year | project	17	22	22

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- References

No definition available.

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- Definition

The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126939881&loc=SL6806780-109447

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 1B
-Subparagraph b
-URI https://asc.fasb.org/extlink&oid=126939881&loc=SL6806780-109447

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- Definition

The amount of exploratory well costs that have been capitalized for a period of one year or less after the completion of drilling.

+ References

No definition available.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 1B
-Subparagraph b
-URI https://asc.fasb.org/extlink&oid=126939881&loc=SL6806780-109447

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