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Impairment Of Exploration And Evaluation And Oil And Gas Properties - Summary of Impairment Reversals (Detail) - Wheatstone [member] $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Producing [member]
Summary of impairment reversals [Line Items]
Increase	$ 116
Decrease	(43)
WDS Australia Segment [Member]
Summary of impairment reversals [Line Items]
Increase	(117)
Decrease	127
Brent Price Measurement Input [member] | WDS Australia Segment [Member]
Summary of impairment reversals [Line Items]
Increase	294
Decrease	(294)
FX Measurement Input [member] | WDS Australia Segment [Member]
Summary of impairment reversals [Line Items]
Increase	(79)
Decrease	$ 79

X

- Definition

The amount of increase (decrease) in the fair value measurement of assets due to a reasonably possible decrease in an unobservable input.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph h
-Clause ii
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-URIDate 2022-03-24

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X

- Definition

The amount of increase (decrease) in the fair value measurement of assets due to a reasonably possible increase in an unobservable input.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2022-03-24
-Paragraph 93
-Subparagraph h
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2022-en-r&anchor=para_93_h_ii&doctype=Standard
-URIDate 2022-03-24

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X

- Definition

Summary of impairment reversals

+ References

No definition available.

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- Details

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