Represents capitalized well cost greater than one year attributable to project.

No definition available.

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- Definition

Project interest percentage.

+ References

No definition available.

+ Details

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- Definition

Percentage of participation interest in exploration project.

+ References

No definition available.

+ Details

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- Definition

Well costs incurred and expensed in the same year.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Number of exploratory oil and gas wells capable of producing either oil or gas in sufficient quantity to justify completion as oil or gas well.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1205
-Paragraph (a)
-Subparagraph (1)

+ Details

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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

No definition available.

+ Details

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- Definition

Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well.

+ 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)(3)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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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 http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447

+ Details

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- Details

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Property, Plant and Equipment - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) well	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Capitalized Exploratory Well Costs [Line Items]
Charge to write-off previously capitalized exploratory wells	$ 125	$ 0	$ 14
Capitalized exploratory well costs that have been capitalized for period greater than one year	342
Well costs incurred and expensed	67	$ 49	$ 151
Shenzi Field
Capitalized Exploratory Well Costs [Line Items]
Charge to write-off previously capitalized exploratory wells	$ 125
Project interest percentage	28.00%
Aspy Exploration Well in Canada, Offshore Nova Scotia
Capitalized Exploratory Well Costs [Line Items]
Project interest percentage			50.00%
Capitalized exploratory well costs that have been capitalized for period greater than one year			$ 120	$ 14
Stabroek Block, Offshore Guyana
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	85.00%
Project participation interest percentage	30.00%
JDA, Gulf of Thailand
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	10.00%
Project participation interest percentage	50.00%
Successful exploration wells \| well	3
North Malay Basin, Offshore Peninsular Malaysia
Capitalized Exploratory Well Costs [Line Items]
Capitalized well costs percentage	5.00%
Project participation interest percentage	50.00%
Successful exploration wells \| well	1