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Exploration And Evaluation - Summary of Exploration And Evaluation (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance $ 807  
Carrying amount, Ending balance 668 $ 807
Exploration commitments 4,245 6,469
Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Disposals at written down value   (10)
Asia Pacific [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 529  
Carrying amount, Ending balance 568 529
Americas [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 240  
Carrying amount, Ending balance 76 240
Africa [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 38  
Carrying amount, Ending balance 24 38
Exploration and evaluation assets [member] | Asia Pacific [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 3 1
Exploration and evaluation assets [member] | Asia Pacific [Member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 529 546
Additions 79 19
Expensed [1] (31) 0
Transferred exploration and evaluation (9) [2] (36)
Carrying amount, Ending balance 568 529
Exploration and evaluation assets [member] | Americas [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 1 1
Exploration and evaluation assets [member] | Americas [Member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 240  
Acquisitions through business combination [3]   180
Additions 161 204
Disposals at written down value   (10)
Amortisation of licence acquisition costs (2) (8)
Expensed [1] (28) (126)
Transferred exploration and evaluation [2] (295)  
Carrying amount, Ending balance 76 240
Exploration and evaluation assets [member] | Africa [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 35 27
Exploration and evaluation assets [member] | Africa [Member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 38 68
Additions 6 17
Amortisation of licence acquisition costs (2) (2)
Expensed [1] (18) (45)
Carrying amount, Ending balance 24 38
Exploration and evaluation assets [member] | Other [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 39 29
Exploration and evaluation assets [member] | Other [member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 807 614
Acquisitions through business combination [3]   180
Additions 246 240
Amortisation of licence acquisition costs (4) (10)
Expensed [1] (77) (171)
Transferred exploration and evaluation (304) [2] (36)
Carrying amount, Ending balance $ 668 $ 807
[1] $77 million (2022: $125 million) relates to costs of unsuccessful wells.
[2] On 20 June 2023, the Group made a final investment decision to develop the Trion resource in Mexico. Related exploration and evaluation assets of $274 million were transferred to oil and gas properties.
[3] Refer to Note B.5 for details of business combination.