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Pension and other post-retirement obligations (Tables)
12 Months Ended
Jun. 30, 2020
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Summary of Net Liability Recognised in Consolidated Balance Sheet
Net liability recognised in the Consolidated Balance Sheet
The net liability recognised in the Consolidated Balance Sheet is as follows:
 
   
Defined benefit pension
schemes / post-
employment obligations
  
Post-retirement medical

schemes
 
   
2020
  2019  
2020
   2019 
   
US$M
  US$M  
US$M
   US$M 
Present value of funded defined benefit obligation
  
 
613
 
  632  
 
 
    
Present value of unfunded defined benefit obligation
  
 
354
 
  306  
 
214
 
   203 
Fair value of defined benefit scheme assets
  
 
(634
  (648       
  
 
 
  
 
 
  
 
 
   
 
 
 
Scheme deficit
  
 
333
 
  290  
 
214
 
   203 
  
 
 
  
 
 
  
 
 
   
 
 
 
Unrecognised surplus
  
 
 
    
 
 
    
Unrecognised past service credits
  
 
 
    
 
 
    
Adjustment for employer contributions tax
  
 
 
    
 
 
    
  
 
 
  
 
 
  
 
 
   
 
 
 
Net liability recognised in the Consolidated Balance Sheet
  
 
333
 
  290  
 
214
 
   203