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Net finance costs (Tables)
 6 Months Ended
Dec. 31, 2022
Text block [abstract]  
Summary of Net Finance Costs
    
Half year

ended

31 Dec

2022

US$M
    
Half year

ended

31 Dec

2021

US$M
    
Year

ended

30 June

2022

US$M
  
Financial expenses
                         
Interest expense using the effective interest rate method:
                         
Interest on bank loans, overdrafts and all other borrowings
   
 
487
 
     230       491  
Interest capitalised at 5.20% (31 December 2021: 2.48%; 30 June 2022: 2.90%)
1
   
 
(114
) 
     (49 )      (113 ) 
Interest on lease liabilities
   
 
62
 
     63       119  
Discounting on provisions and other liabilities
   
 
613
 
     243       645  
Other gains and losses:
                         
Fair value change on hedged loans
   
 
(754
) 
     (245 )      (1,286 ) 
Fair value change on hedging derivatives
   
 
659
 
     218       1,277  
Exchange variations on net debt
   
 
(90
) 
     (83 )      (99 ) 
Other
   
 
–
 
     –       16  
    
 
 
    
 
 
    
 
 
  
Total financial expenses
   
 
863
 
     377       1,050  
    
 
 
    
 
 
    
 
 
  
Financial income
                         
Interest income
   
 
(211
) 
     (25 )      (81 ) 
    
 
 
    
 
 
    
 
 
  
Net finance costs
   
 
652
 
     352       969  
    
 
 
    
 
 
    
 
 
  
 
1
Interest has been capitalised at the rate of interest applicable to the specific borrowings financing the assets under construction or, where financed through general borrowings, at a capitalisation rate representing the average interest rate on such borrowings.