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Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year $ 71,818 $ 61,295
Additions 10,926 8,448
Remeasurements of index-linked freight contracts 230 53
Depreciation for the year (5,188) (4,967)
Impairments for the year (3,833) (73)
Disposals (16) (8)
Divestment of subsidiaries and operations (1,453)  
Transfers and other movements (855) (606)
At the end of the financial year 71,629 71,818
Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 135,346  
At the end of the financial year 142,210 135,346
Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (63,528)  
At the end of the financial year (70,581) (63,528)
Land and buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 8,140 8,079
Additions 27 194
Depreciation for the year (637) (586)
Impairments for the year (88)  
Disposals (1) (2)
Divestment of subsidiaries and operations (293)  
Transfers and other movements 417 367
At the end of the financial year 7,565 8,140
Land and buildings [member] | Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 15,258  
At the end of the financial year 15,180 15,258
Land and buildings [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (7,118)  
At the end of the financial year (7,615) (7,118)
Plant and equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 36,654 35,500
Additions 1,206 1,024
Remeasurements of index-linked freight contracts 230 53
Depreciation for the year (4,287) (4,156)
Impairments for the year (1,440) (73)
Disposals (15) (6)
Divestment of subsidiaries and operations (1,093)  
Transfers and other movements 3,249 2,056
At the end of the financial year 34,504 36,654
Plant and equipment [member] | Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 85,394  
At the end of the financial year 86,989 85,394
Plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (48,740)  
At the end of the financial year (52,485) (48,740)
Other mineral assets [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 13,304 8,494
Additions 795 842
Depreciation for the year (264) (225)
Impairments for the year (930)  
Divestment of subsidiaries and operations (23)  
Transfers and other movements (655) (419)
At the end of the financial year 12,227 13,304
Other mineral assets [member] | Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 19,420  
At the end of the financial year 19,900 19,420
Other mineral assets [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (6,116)  
At the end of the financial year (7,673) (6,116)
Assets under construction [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 13,481 9,031
Additions 8,840 6,332
Impairments for the year (1,365)  
Divestment of subsidiaries and operations (44)  
Transfers and other movements (3,815) (2,602)
At the end of the financial year 17,097 13,481
Assets under construction [member] | Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 14,245  
At the end of the financial year 19,106 14,245
Assets under construction [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (764)  
At the end of the financial year (2,009) (764)
Exploration and evaluation [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 239 191
Additions 58 56
Impairments for the year (10)  
Transfers and other movements (51) (8)
At the end of the financial year 236 239
Exploration and evaluation [member] | Cost [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year 1,029  
At the end of the financial year 1,035 1,029
Exploration and evaluation [member] | Accumulated depreciation, amortisation and impairment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
At the beginning of the financial year (790)  
At the end of the financial year $ (799) (790)
OZ Minerals Limited [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition of subsidiaries and operations   7,676
OZ Minerals Limited [member] | Land and buildings [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition of subsidiaries and operations   88
OZ Minerals Limited [member] | Plant and equipment [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition of subsidiaries and operations   2,256
OZ Minerals Limited [member] | Other mineral assets [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition of subsidiaries and operations   4,612
OZ Minerals Limited [member] | Assets under construction [member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Acquisition of subsidiaries and operations   $ 720