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Taxes - Summary of Reconciliation of Effective and Applicable Income Tax Expenses (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Reconciliation Of Effective And Applicable Income Tax Expenses [Line Items]      
Profit/(loss) before tax $ 9,174 $ 3,290 $ (5,440)
PRRT benefit/(expense) (313) 297 (439)
Tax expense/(benefit) 2,912 957 (1,026)
Income Tax [Member]      
Disclosure Of Reconciliation Of Effective And Applicable Income Tax Expenses [Line Items]      
Profit/(loss) before tax 9,174 3,290 (5,440)
PRRT benefit/(expense) 313 (297) 439
Profit/(loss) before income tax 9,487 2,993 (5,001)
Income tax expense/(benefit) calculated at 30% 2,847 898 (1,500)
Effect of tax rate differentials (141) (42) 192
Effect of deferred tax assets not recognised 150 114 270
Foreign exchange impact on tax (benefit)/expense (44) (18) 3
Adjustment to prior years (45) (2) 7
Integration and transaction costs non-deductible 142 0 0
Other 3 7 2
Tax expense/(benefit) 2,912 957 (1,026)
Petroleum Resource Rent Tax [member]      
Disclosure Of Reconciliation Of Effective And Applicable Income Tax Expenses [Line Items]      
Profit/(loss) before tax 9,174 3,290 (5,440)
Non-PRRT assessable (profit)/loss (6,197) (2,134) 3,080
PRRT projects profit/(loss) before tax 2,977 1,156 (2,360)
Income tax expense/(benefit) calculated at 30% 1,191 462 (944)
(Recognition)/derecognition of Pluto general expenditure (1,362) 0 627
Augmentation (175) (166) (138)
Other 33 1 16
Tax expense/(benefit) $ (313) $ 297 $ (439)