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Financial Risk Management - Summary of Reconciliation of Components of Equity and Analysis of Movements in Reserves for all Hedges (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year $ 46 $ 27
Add: Change in fair value of hedging instrument recognised in OCI (640) 604
Less: Reclassified from reserves to interest expense – recognised through OCI 616 (585)
At the end of the financial year 22 46
Cash flow hedging reserve, gross [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 142 71
Add: Change in fair value of hedging instrument recognised in OCI (914) 863
Less: Reclassified from reserves to interest expense – recognised through OCI 831 (792)
At the end of the financial year 59 142
Cash flow hedging reserve, tax [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (42) (21)
Add: Change in fair value of hedging instrument recognised in OCI 274 (259)
Less: Reclassified from reserves to interest expense – recognised through OCI (250) 238
At the end of the financial year (18) (42)
Cash flow hedging reserve, net [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 100 50
Add: Change in fair value of hedging instrument recognised in OCI (640) 604
Less: Reclassified from reserves to interest expense – recognised through OCI 581 (554)
At the end of the financial year 41 100
Cost of hedging reserve, gross [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (77) (32)
Less: Reclassified from reserves to interest expense – recognised through OCI 50 (45)
At the end of the financial year (27) (77)
Cost of hedging reserve, tax [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year 23 9
Less: Reclassified from reserves to interest expense – recognised through OCI (15) 14
At the end of the financial year 8 23
Cost of hedging reserve, net [member]    
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items]    
At the beginning of the financial year (54) (23)
Less: Reclassified from reserves to interest expense – recognised through OCI 35 (31)
At the end of the financial year $ (19) $ (54)