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Impairment Of Exploration And Evaluation And Oil And Gas Properties - Summary of Assuming all Other Variables are Held Constant (Detail) - Oil And Gs Properties [Member] - Goodwill [member]	Dec. 31, 2022
Shenzi [Member]
Disclosure In Tabular Form Of Analysis In Respect Of Input Changes So That Recoverable Value Equals To Carrying Value [Line Items]
Commodity price % change	7.00%
Atlantis [Member]
Disclosure In Tabular Form Of Analysis In Respect Of Input Changes So That Recoverable Value Equals To Carrying Value [Line Items]
Commodity price % change	2.00%
Nominal discount rate (absolute terms)	10.00%

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- Definition

The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2022-03-24
-Paragraph 130
-Subparagraph g
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- Definition

Disclosure in tabular form of analysis in respect of input changes so that recoverable value equals to carrying value.

+ References

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- Definition

Percentage of reasonably increase decrease in unobservable input assets due to which carrying value will be equal to the fair value.

+ References

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