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Intangible assets
 12 Months Ended
Jun. 30, 2022
Text block [abstract]  
Intangible assets
12    Intangible assets
 
 
  
2022
 
 
2021
 
 
  
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
   
 
1,197
 
   
 
240
 
   
 
1,437
 
      1,197        377       1,574  
Additions
   
 
–
 
   
 
36
 
   
 
36
 
      –        23       23  
Amortisation for the year
   
 
–
 
   
 
(60
)
   
 
(60
)
 
      –        (93 )      (93 ) 
Impairments for the year
1
   
 
–
 
   
 
–
 
   
 
–
 
      –        (52 )      (52 ) 
Disposals
   
 
–
 
   
 
(16
)
   
 
(16
)
      –        –       –  
Divestment and demerger of subsidiaries and operations
2

   
 
–
 
   
 
(66
)
 
   
 
(66
)
      –        –       –  
Transfers and other movements
   
 
–
 
   
 
38
 
   
 
38
 
      –        (15 )      (15 ) 
    
 
 
     
 
 
     
 
 
     
 
 
     
 
 
    
 
 
  
At the end of the financial year
   
 
1,197
 
   
 
172
 
   
 
1,369
 
      1,197        240       1,437  
    
 
 
     
 
 
     
 
 
     
 
 
     
 
 
    
 
 
  
– Cost
   
 
1,197
 
   
 
1,363
 
   
 
2,560
 
      1,197        1,506       2,703  
– Accumulated amortisation and impairments
   
 
–
 
   
 
(1,191
)
   
 
(1,191
)
      –        (1,266 )      (1,266 ) 
    
 
 
     
 
 
     
 
 
     
 
 
     
 
 
    
 
 
  
 
1
 
Refer to note 13 ‘Impairment of non-current assets’ for information on impairments.
 
2
 
Relates to the merger of Petroleum with Woodside. Refer to note 27 ‘Discontinued operations’ for more information.
Recognition and measurement
Goodwill
Where th
e
 fair value of the consideration paid for a business acquisition exceeds the fair value of the identifiable assets, liabilities and contingent liabilities acquired, the difference is treated as goodwill. Where consideration is less than the fair value of acquired net assets, the difference is recognised immediately in the income statement. Goodwill is not amortised and is measured at cost less any impairment losses.
Other intangibles
The Group capitalises amounts paid for the acquisition of identifiable intangible assets, such as software, licences and initial payments for the acquisition of mineral lease assets, where it is considered that they will contribute to future periods through revenue generation or reductions in cost. These assets, classified as finite life intangible assets, are carried in the balance sheet at the fair value of consideration paid (cost) less accumulated amortisation and impairment charges. Intangible assets with finite useful lives are amortised on a straight-line basis over their useful lives. The estimated useful lives are generally no greater than eight years.
Initial payments for the acquisition of intangible mineral lease assets are capitalised and amortised over the term of the permit. A regular review is undertaken of each area of interest to determine the appropriateness of continuing to carry forward costs in relation to that area. Capitalised costs are only carried forward to the extent that they are expected to be recovered through the successful exploitation of the area of interest or alternatively by its sale. To the extent that capitalised expenditure is no longer expected to be recovered, it is charged to the income statement.

Assets classified as held for sale are measured at the lower of their carrying amount and fair value less cost to sell and therefore not amortised.