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Goodwill (Tables)
 12 Months Ended
Dec. 31, 2023
Disclosure of reconciliation of changes in goodwill [abstract]  
Summary of goodwill
 
  
  
US$m
 
Year ended 31 December 2023
  
Carrying amount at 1 January 2023
   
 
4,614
  
Adjustment to purchase price allocation
1
   
 
55
  
Impairment
2
   
 
(477
)
Transfer to assets held for sale
3
   
 
(197
)
 
Carrying amount at 31 December 2023
   
 
3,995
 
At 31 December 2023
         
Cost
   
 
4,472
 
Accumulated impairment
   
 
(477
)
Net carrying amount
  
 
3,995
  
Year ended 31 December 2022
         
Carrying amount at 1 January 2022
   
 
-
 
Acquisitions through business combinations
1
   
 
4,614
 
Carrying amount at 31 December 2022
   
 
4,614
 
At 31 December 2022
         
Cost
   
 
4,614
 
Accumulated impairment
   
 
-
 
Net carrying amount
   
 
4,614
 
 
1.
Refer to Note B.5 for details on business combination.
2.
Refer to Note B.4 for details on impairment.
3.
Refer to Note B.8 for details of the sell-down of the Scarborough Joint Venture.