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Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Components Of Income Tax Expense [Line Items]      
Deferred tax expense income recognized in the income statement $ (702) $ 118 $ 616
Recognised Deferred tax assets $ 1,717 $ 1,959  
Long term bond rate 3.20% 3.20%  
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 $ 7,428 $ 6,523  
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 872 189  
Unused tax losses and credits [Member]      
Disclosure Of Components Of Income Tax Expense [Line Items]      
Recognised Deferred tax assets 333 93  
Temporary Difference Wheatstone [Member]      
Disclosure Of Components Of Income Tax Expense [Line Items]      
Deductible temporary differences for which no deferred tax asset is recognised 758 831  
Pluto PRRT Deferred Tax Asset [Member]      
Disclosure Of Components Of Income Tax Expense [Line Items]      
Increase decrease in the deferred tax asset after tax 446    
Increase (decrease) in deferred tax asset 637 1,362  
Trion [member]      
Disclosure Of Components Of Income Tax Expense [Line Items]      
Deferred tax expense income recognized in the income statement 319    
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 232 250  
Recognised Deferred tax assets 1,248 1,371  
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 763 1,061  
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 $ 189 $ 146