v3.26.1
Leases - Summary of Movements in Right of Use Assets (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year $ 2,653 $ 2,708  
Additions 1,111 870  
Remeasurements of index-linked freight contracts 340 (210)  
Depreciation expensed during the period (1,036) (717) $ (717)
Impairments for the year (29) 0  
Transfers and other movements (9) 2  
At the end of the financial year 3,030 2,653 2,708
Gross carrying amount [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year 5,454    
At the end of the financial year 6,520 5,454  
Accumulated depreciation, amortisation and impairment [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year (2,801)    
At the end of the financial year (3,490) (2,801)  
Land and buildings [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year 439 490  
Additions 87 26  
Remeasurements of index-linked freight contracts 0 0  
Depreciation expensed during the period (75) (75)  
Impairments for the year 0 0  
Transfers and other movements 0 (2)  
At the end of the financial year 451 439 490
Land and buildings [member] | Gross carrying amount [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year 764    
At the end of the financial year 838 764  
Land and buildings [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year (325)    
At the end of the financial year (387) (325)  
Plant and equipment [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year 2,214 2,218  
Additions 1,024 844  
Remeasurements of index-linked freight contracts 340 (210)  
Depreciation expensed during the period (961) (642)  
Impairments for the year (29) 0  
Transfers and other movements (9) 4  
At the end of the financial year 2,579 2,214 $ 2,218
Plant and equipment [member] | Gross carrying amount [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year 4,690    
At the end of the financial year 5,682 4,690  
Plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
At the beginning of the financial year (2,476)    
At the end of the financial year $ (3,103) $ (2,476)