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Additional Information - Summary of Movement in Capitalised Exploratory Well Costs (Detail) - Exploration and evaluation assets [member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Detailed Information About Exploration And Evaluation [Line Items] |  |  |
At the beginning of the year | $ 614 | $ 2,045 | $ 3,809
Acquisition to the capitalised exploratory well costs pending the determination of proved reserves | 180 |  |
Additions to the capitalised exploratory well costs pending the determination of proved reserves | 111 | 501 | 399
Capitalised exploratory well costs expensed | (62) | (268) | (1,571)
Capitalised exploratory well costs reclassified to wells, equipment and facilities based on the determination of proved reserves | (36) | (1,664) | (592)
Sale of suspended wells | 0 |  |
At the end of the year | $ 807 | $ 614 | $ 2,045

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- Definition Acquisitions to the capitalised exploratory well costs pending the determination of proved reserves. + References No definition available. + Details
Name: | wds_AcquisitionsToTheCapitalisedExploratoryWellCostsPendingTheDeterminationOfProvedReserves
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Additions to the capitalised exploratory well costs pending the determination of proved reserves. + References No definition available. + Details
Name: | wds_AdditionsToTheCapitalisedExploratoryWellCostsPendingTheDeterminationOfProvedReserves
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Capitalised exploratory well costs. + References No definition available. + Details
Name: | wds_CapitalisedExploratoryWellCosts
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Capitalised exploratory well costs expensed. + References No definition available. + Details
Name: | wds_CapitalisedExploratoryWellCostsExpensed
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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

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- Definition Reclassification of capitalised exploratory well costs based on determination of proved reserves. + References No definition available. + Details
Name: | wds_ReclassificationOfCapitalisedExploratoryWellCostsBasedOnDeterminationOfProvedReserves
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Sale of suspended wells. + References No definition available. + Details
Name: | wds_SaleOfSuspendedWells
Namespace Prefix: | wds_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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