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Exploration And Evaluation - Summary of Exploration And Evaluation (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance $ 668  
Additions 40 $ 134
Carrying amount, Ending balance 721 668
Exploration commitments 3,841 4,245
Exploration and evaluation assets [member] | Asia Pacific [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 4 3
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 568 529
Additions 17 79
Expensed (3) (31)
Transferred exploration and evaluation (11) (9) [1]
Carrying amount, Ending balance 571 568
Exploration and evaluation assets [member] | Americas [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments   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 76 240
Additions 81 161
Amortisation of licence acquisition costs (8) (2)
Expensed   (28)
Transferred exploration and evaluation [1]   (295)
Carrying amount, Ending balance 149 76
Exploration and evaluation assets [member] | Africa [Member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 10 35
Exploration and evaluation assets [member] | Africa [Member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 24 38
Additions 1 6
Amortisation of licence acquisition costs   (2)
Expensed (6) (18)
Transferred exploration and evaluation (18)  
Carrying amount, Ending balance 1 24
Exploration and evaluation assets [member] | Other [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Exploration commitments 14 39
Exploration and evaluation assets [member] | Other [member] | Carrying Amounts [member]    
Disclosure of detailed information about exploration and evaluation [line items]    
Carrying amount, Beginning balance 668 807
Additions 99 246
Amortisation of licence acquisition costs (8) (4)
Expensed (9) (77)
Transferred exploration and evaluation (29) (304) [1]
Carrying amount, Ending balance $ 721 $ 668
[1] 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 property, plant and equipment.