v3.25.2
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year $ 71,629 $ 71,818  
Additions 11,500 10,926  
Remeasurements of index-linked freight contracts (210) 230  
Depreciation for the year (5,429) (5,188)  
Net impairments for the year (171) (3,890)  
Disposals (20) (16)  
Divestment of subsidiaries and operations (43) (1,453)  
Transfers and other movements (864) (855)  
At the end of the financial year 76,457 71,629 $ 71,818
Property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Net impairments for the year (106) (3,833) (73)
Cost [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 142,210    
At the end of the financial year 151,586 142,210  
Accumulated depreciation, amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year (70,581)    
At the end of the financial year (75,129) (70,581)  
Land and buildings [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 7,565 8,140  
Additions 28 27  
Depreciation for the year (578) (637)  
Net impairments for the year (7) (88)  
Disposals (1) (1)  
Divestment of subsidiaries and operations   (293)  
Transfers and other movements 404 417  
At the end of the financial year 7,411 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 15,180    
At the end of the financial year 15,617 15,180  
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 (7,615)    
At the end of the financial year (8,206) (7,615)  
Plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 34,504 36,654  
Additions 1,653 1,206  
Remeasurements of index-linked freight contracts (210) 230  
Depreciation for the year (4,441) (4,287)  
Net impairments for the year (76) (1,440)  
Disposals (19) (15)  
Divestment of subsidiaries and operations (1) (1,093)  
Transfers and other movements 5,143 3,249  
At the end of the financial year 36,553 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 86,989    
At the end of the financial year 93,385 86,989  
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 (52,485)    
At the end of the financial year (56,832) (52,485)  
Other mineral assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 12,227 13,304  
Additions 1,066 795  
Depreciation for the year (410) (264)  
Net impairments for the year (23) (930)  
Divestment of subsidiaries and operations (42) (23)  
Transfers and other movements (581) (655)  
At the end of the financial year 12,237 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 19,900    
At the end of the financial year 20,359 19,900  
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 (7,673)    
At the end of the financial year (8,122) (7,673)  
Assets under construction [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 17,097 13,481  
Additions 8,703 8,840  
Net impairments for the year   (1,365)  
Divestment of subsidiaries and operations   (44)  
Transfers and other movements (5,754) (3,815)  
At the end of the financial year 20,046 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 19,106    
At the end of the financial year 22,002 19,106  
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 (2,009)    
At the end of the financial year (1,956) (2,009)  
Exploration and evaluation [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
At the beginning of the financial year 236 239  
Additions 50 58  
Net impairments for the year   (10)  
Transfers and other movements (76) (51)  
At the end of the financial year 210 236 $ 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 1,035    
At the end of the financial year 223 1,035  
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 (799)    
At the end of the financial year $ (13) $ (799)