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Leases - Summary of Movements in Lease Liabilities (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
At the beginning of the financial year $ 2,576  
At the end of the financial year 3,019 $ 2,576
Comprising:    
Current liabilities 521 519
Non-current liabilities 2,498 2,057
Lease liabilities [member]    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
At the beginning of the financial year 2,576 3,896
Additions 542 866
Remeasurements of index-linked freight contracts 53 (369)
Lease payments (706) (1,288)
Foreign exchange movement 12 (126)
Amortisation of discounting 130 125
Divestment and demerger of subsidiaries and operations   (492)
Transfers and other movements (11) (36)
At the end of the financial year 3,019 2,576
Comprising:    
Current liabilities 521 519
Non-current liabilities 2,498 $ 2,057
Lease liabilities [member] | OZ Minerals Limited [member]    
Disclosure of reconciliation of liabilities arising from financing activities [line items]    
Acquisition of subsidiaries and operations $ 423