Property, plant and equipment (Tables)
 12 Months Ended
Jun. 30, 2021
Text block [abstract]  
Summary of Property, Plant and Equipment
    
Land and

buildings
    
Plant and

equipment
    
Other

mineral

assets
    
Assets under

construction
    
Exploration

and

evaluation
    
Total
  
    
US$M
    
US$M
    
US$M
    
US$M
    
US$M
    
US$M
  
Net book value – 30 June 2021
                                                 
At the beginning of the financial year
   
 
8,387
 
  
 
39,429
 
  
 
8,652
 
  
 
13,774
 
  
 
2,120
 
  
 
72,362
 
Additions
(1)
   
 
25
 
  
 
3,841
 
  
 
797
 
  
 
5,961
 
  
 
93
 
  
 
10,717
 
Acquisition of subsidiaries & operations
(2)
   
 
–
 
  
 
151
 
  
 
491
 
  
 
–
 
  
 
–
 
  
 
642
 
Remeasurements of index-linked freight contracts
(3)
   
 
–
 
  
 
(59
) 
  
 
–
 
  
 
–
 
  
 
–
 
  
 
(59
) 
Depreciation for the year
   
 
(694
) 
  
 
(5,748
) 
  
 
(310
) 
  
 
–
 
  
 
–
 
  
 
(6,752
) 
Impairments for the year
(4)
   
 
(208
) 
  
 
(877
) 
  
 
(687
) 
  
 
(745
) 
  
 
(66
) 
  
 
(2,583
) 
Disposals
   
 
(18
) 
  
 
(9
) 
  
 
–
 
  
 
–
 
  
 
–
 
  
 
(27
) 
Divestment and demerger of subsidiaries and operations
(5)
   
 
–
 
  
 
(14
) 
  
 
–
 
  
 
(2
) 
  
 
–
 
  
 
(16
) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Transfers and other movements
   
 
580
 
  
 
7,968
 
  
 
(2
) 
  
 
(8,556
) 
  
 
(461
) 
  
 
(471
) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
At the end of the financial year
(6)
   
 
8,072
 
  
 
44,682
 
  
 
8,941
 
  
 
10,432
 
  
 
1,686
 
  
 
73,813
 
– Cost
   
 
14,545
 
  
 
108,049
 
  
 
15,059
 
  
 
11,177
 
  
 
2,531
 
  
 
151,361
 
– Accumulated depreciation and impairments
   
 
(6,473
) 
  
 
(63,367
) 
  
 
(6,118
) 
  
 
(745
) 
  
 
(845
) 
  
 
(77,548
) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Net book value – 30 June 2020
                                                 
At the beginning of the financial year
      7,885       38,174       9,211       11,149       1,622       68,041  
Impact of adopting IFRS 16
      754       1,400       –       –       –       2,154  
Additions
(1)
      115       1,719       684       6,100       218       8,836  
Remeasurements of index-linked freight contracts
(3)
      –       733       –       –       –       733  
Depreciation for the year
      (630 )      (5,104 )      (294 )      –       –       (6,028 ) 
Impairments for the year
(4)
      (17 )      (189 )      (288 )      –       –       (494 ) 
Disposals
      (12 )      (22 )      –       –       (65 )      (99 ) 
Transfers and other movements
      292       2,718       (661 )      (3,475 )      345       (781 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
At the end of the financial year
 (6)
      8,387       39,429       8,652       13,774       2,120       72,362  
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
– Cost
      13,932       97,230       13,736       13,774       2,899       141,571  
– Accumulated depreciation and impairments
      (5,545 )      (57,801 )      (5,084 )      –       (779 )      (69,209 ) 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
 
(1)
 
Includes change in estimates and net foreign exchange gains/(losses) related to the closure and rehabilitation provisions for operating sites. Refer to note 15 ‘Closure and rehabilitation provisions’.
 
(2)
 
Relates to the acquisition of an additional 28 per cent working interest in Shenzi.
 
(3)
 
Relates to remeasurements of index-linked freight contracts including continuous voyage charters (CVCs). Refer to note 21 ‘Leases’.
 
(4)
 
Refer to note 13 ‘Impairment of non-current assets’ for information on impairments.
 
(5)
 
Relates to the sale of the Neptune asset in Gulf of Mexico.
 
(6)
 
Includes the carrying value of the Group’s
right-of-use
assets relating to land and buildings and plant and equipment of US$3,350 million (2020: US$3,047 million). Refer to note 21 ‘Leases’ for the movement of the
right-of-use
assets.
Summary of Principal Depreciation Methods and Rates Applied to Major Asset Categories The table below summarises the principal depreciation methods and rates applied to major asset categories by the Group.
 
  
Category
   
Buildings
   
Plant and
equipment
   
Mineral rights and
petroleum interests
   
Capitalised exploration,
evaluation and
development
expenditure
  
 
   
Typical depreciation methodology
    SL    SL    UoP    UoP    
             
   
Depreciation rate
   
25-50
years		   
3-30
years		    Based on the rate of depletion of reserves    Based on the rate of depletion of reserves