XML 270 R177.htm IDEA: XBRL DOCUMENT
v3.22.4

Additional Information - Summary of Movement in Capitalised Exploratory Well Costs (Parenthetical) (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($)
Exploration and evaluation assets [member] |
Disclosure Of Detailed Information About Exploration And Evaluation [Line Items] |
Impairment losses | $ 1,557

X
- Definition Disclosure Of Detailed Information About Exploration And Evaluation. + References No definition available. + Details
Name: | wds_DisclosureOfDetailedInformationAboutExplorationAndEvaluationLineItems
Namespace Prefix: | wds_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impairment losses on capitalised exploratory well costs. + References No definition available. + Details
Name: | wds_ImpairmentLossesOnCapitalisedExploratoryWellCosts
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_ExplorationAndEvaluationAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |