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Exploration and Evaluation (Tables)
 12 Months Ended
Dec. 31, 2022
Text Block [abstract]  
Summary of Exploration And Evaluation
      
Asia Pacific
US$m
       
Americas
US$m
       
Africa
US$m
       
Total
US$m
  
 
  
Year ended 31 December 2022
                                            
Carrying amount at 1 January 2022
     
 
546
 
     
 
-
 
     
 
68
 
     
 
614
 
Acquisitions through business combination
1
    
 
-
 
     
 
180
 
     
 
-
 
     
 
180
 
Additions
     
 
19
 
     
 
204
 
     
 
17
 
     
 
240
 
Disposals
     
 
-
 
     
 
(10)
 
     
 
-
 
     
 
(10)
 
Amortisation of licence acquisition costs
     
 
-
 
     
 
(8)
 
     
 
(2)
 
     
 
(10)
 
Expensed
2
    
 
-
 
     
 
(126)
 
     
 
(45)
 
     
 
(171)
 
Transferred exploration and evaluation
     
 
(36)
 
     
 
-
 
     
 
-
 
     
 
(36)
 
 
  
Carrying amount at 31 December 2022
     
 
529
 
     
 
240
 
     
 
38
 
     
 
807
 
 
  
Year ended 31 December 2021
3
                                            
Carrying amount at 1 January 2021
     
 
1,981
 
     
 
-
 
     
 
64
 
     
 
2,045
 
Additions
     
 
494
 
     
 
-
 
     
 
7
 
     
 
501
 
Amortisation of licence acquisition costs
     
 
-
 
     
 
-
 
     
 
(3)
 
     
 
(3)
 
Expensed
2
    
 
(265)
 
     
 
-
 
     
 
-
 
     
 
(265)
 
Transferred exploration and evaluation
     
 
(1,664)
 
     
 
-
 
     
 
-
 
     
 
(1,664)
 
 
  
Carrying amount at 31 December 2021
     
 
546
 
     
 
-
 
     
 
68
 
     
 
614
 
 
  
Exploration commitments
                                            
 
  
Year ended 31 December 2022
     
 
1
 
     
 
1
 
     
 
27
 
     
 
29
 
Year ended 31 December 2021
3
     
 
16
 
     
 
1
 
     
 
77
 
     
 
94
 
 
  
 
1.
Acquisitions through business combination have been recognised on a provisional basis. Adjustments will be made to the provisional amounts if new information is obtained within 12 months from the acquisition date. Refer to Note B.5 for details.
2.
$125 million (2021: $56 million) relates to costs of unsuccessful wells. For the year ended 31 December 2021, $209 million relates to capitalised
cost
s written off due to the Group’s decision to withdraw its interests in
Myanmar. 
3.
Oceania and Asia have been presented within Asia Pacific for the year ended 31 December 2022. The 2021 amounts have been reclassified to be presented on the same basis.