Auditor's remuneration (Tables)
 12 Months Ended
Jun. 30, 2021
Text block [abstract]  
Summary of Auditors' Remuneration
 
    
2021
      2020      2019  
    
US$M
      US$M      US$M  
Fees payable to the Group’s auditors for assurance services
                           
Audit of the Group’s Annual Report
   
 
10.642
 
      11.196        6.764  
Audit of the accounts of subsidiaries, joint ventures and associates
   
 
1.234
 
      1.262        5.127  
Audit-related assurance services required by legislation to be provided by the auditor
   
 
1.770
 
      1.815        1.358  
Other assurance and agreed-upon procedures under legislation or contractual arrangements
   
 
1.867
 
      2.003        1.266  
    
 
 
     
 
 
     
 
 
  
Total assurance services
   
 
15.513
 
      16.276        14.515  
    
 
 
     
 
 
     
 
 
  
Fees payable to the Group’s auditors for
non-assurance
services
                           
Other services
   
 
–
 
      0.400        0.013  
    
 
 
     
 
 
     
 
 
  
Total other services
   
 
–
 
      0.400        0.013  
    
 
 
     
 
 
     
 
 
  
Total fees
   
 
15.513
 
      16.676        14.528