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Intangible assets (Tables)
12 Months Ended
Jun. 30, 2020
Text block [abstract]  
Summary of Intangible Assets
 
   
2020
  2019 
   
Goodwill
   
Other
intangibles
  
Total
  Goodwill   Other
intangibles
  Total 
   
US$M
   
US$M
  
US$M
  US$M   US$M  US$M 
Net book value
         
At the beginning of the financial year
  
 
247
 
  
 
428
 
 
 
675
 
  247    531   778 
Additions
  
 
 
  
 
98
 
 
 
98
 
      31   31 
Amortisation for the year
  
 
 
  
 
(118
)
 
 
 
(118
)
 
      (142  (142
Impairments for the year
  
 
 
  
 
 
 
 
 
      (14  (14
Transfers and other movements
  
 
 
  
 
(31
)
 
 
 
(31
)
 
      22   22 
  
 
 
   
 
 
  
 
 
  
 
 
   
 
 
  
 
 
 
At the end of the financial year
(1)
  
 
247
 
  
 
377
 
 
 
624
 
  247    428   675 
  
 
 
   
 
 
  
 
 
  
 
 
   
 
 
  
 
 
 
– Cost
  
 
247
 
  
 
1,580
 
 
 
1,827
 
  247    1,697   1,944 
– Accumulated amortisation and impairments
  
 
 
  
 
(1,203
)
 
 
 
(1,203
)
 
      (1,269  (1,269
  
 
 
   
 
 
  
 
 
  
 
 
   
 
 
  
 
 
 
 
(1)
 
The Group’s aggregate net carrying value of goodwill is US$247 million (2019: US$247 million), representing less than one per cent of net equity at 30 June 2020 (2019: less than one per cent). The goodwill is allocated across a number of CGUs.