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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, 2024
Jun. 30, 2023
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 $ 9 $ 22
Add: Change in fair value of hedging instrument recognised in OCI (23) 66
Less: Reclassified from reserves to financial expenses – recognised through OCI 34 (103)
Less: Loss/(gain) transferred to balance sheet related items   24
Less: Loss/(gain) transferred to balance sheet related items   35
At the end of the financial year 20 9
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 15 59
Add: Change in fair value of hedging instrument recognised in OCI (24) 95
Less: Reclassified from reserves to financial expenses – recognised through OCI 49 (174)
Less: Loss/(gain) transferred to balance sheet related items   35
At the end of the financial year 40 15
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 (5) (18)
Add: Change in fair value of hedging instrument recognised in OCI 7 (29)
Less: Reclassified from reserves to financial expenses – recognised through OCI (15) 53
Less: Loss/(gain) transferred to balance sheet related items   (11)
At the end of the financial year (13) (5)
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 10 41
Add: Change in fair value of hedging instrument recognised in OCI (17) 66
Less: Reclassified from reserves to financial expenses – recognised through OCI 34 (121)
Less: Loss/(gain) transferred to balance sheet related items   24
At the end of the financial year 27 10
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 (1) (27)
Add: Change in fair value of hedging instrument recognised in OCI (9)  
Less: Reclassified from reserves to financial expenses – recognised through OCI   26
At the end of the financial year (10) (1)
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 0 8
Add: Change in fair value of hedging instrument recognised in OCI 3  
Less: Reclassified from reserves to financial expenses – recognised through OCI   (8)
At the end of the financial year 3 0
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 (1) (19)
Add: Change in fair value of hedging instrument recognised in OCI (6)  
Less: Reclassified from reserves to financial expenses – recognised through OCI   18
At the end of the financial year $ (7) $ (1)