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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