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Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Unused tax losses for which no deferred tax asset recognised |  | $ 497
Recognised Deferred tax assets | $ 1,959 | $ 1,007
Long term bond rate | 3.20% | 1.50%
Temporary Difference Pluto Quarantined Exploration Expenditure [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | $ 189 | $ 1,432
Temporary Difference North West Shelf Project [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 6,523 | 4,507
Temporary Difference Wheatstone [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Deductible temporary differences for which no deferred tax asset is recognised | 831 | 1,071
Pluto PRRT Deferred Tax Asset [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Increase (decrease) in deferred tax liability (asset) | 1,362 |
USA Tax Consolidation Group [Member] | Unused tax losses and credits [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Unused tax losses for which no deferred tax asset recognised | 250 |
Recognised Deferred tax assets | 1,371 | 0
Other Than Australia And The USA [Member] | Unused tax losses and credits [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Unused tax losses for which no deferred tax asset recognised | 1,061 |
Recognised Deferred tax assets | 93 | $ 0
Outside Of The USA TCG [Member] | Unused tax losses and credits [Member] |  |
Disclosure Of Components Of Income Tax Expense [Line Items] |  |
Unused tax losses for which no deferred tax asset recognised | $ 146 |

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