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Financial Risk Management - Summary of Movement of Interest Bearing Liabilities and Related Derivatives (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Proceeds from interest bearing liabilities $ 1,164 $ 568 $ 514
Settlements of debt related instruments   167 (157)
Repayment of interest bearing liabilities (3,391) (8,395)  
Change from Net financing cash flows (2,227) (7,660)  
Other movements:      
Loss on bond repurchase   395  
Bank loans [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
At the beginning of the financial year 2,260 2,492  
Proceeds from interest bearing liabilities 1,150 504  
Repayment of interest bearing liabilities (941) (737)  
Change from Net financing cash flows 209 (233)  
Other movements:      
Foreign exchange impacts 3 (1)  
Other interest bearing liabilities/derivative related changes   2  
At the end of the financial year 2,472 2,260 2,492
Notes and debentures [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
At the beginning of the financial year 14,769 21,045  
Repayment of interest bearing liabilities (1,232) (6,888)  
Change from Net financing cash flows (1,232) (6,888)  
Other movements:      
Loss on bond repurchase   579  
Interest rate impacts (1,286) (764)  
Foreign exchange impacts (894) 798  
Other interest bearing liabilities/derivative related changes 6 (1)  
At the end of the financial year 11,363 14,769 21,045
Lease Liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
At the beginning of the financial year 3,896 3,443  
Repayment of interest bearing liabilities (1,163) (770)  
Change from Net financing cash flows (1,163) (770)  
Other movements:      
Divestment And Demerger Of Subsidiaries And Operations (492)    
Foreign exchange impacts (126) 115  
Lease additions 866 1,223  
Re-measurements of index-linked freight contracts (369) (59)  
Other interest bearing liabilities/derivative related changes (36) (56)  
At the end of the financial year 2,576 3,896 3,443
Other interest bearing liabilities [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
At the beginning of the financial year 58 68  
Proceeds from interest bearing liabilities 14 64  
Repayment of interest bearing liabilities (55)    
Change from Net financing cash flows (41) 64  
Other movements:      
Foreign exchange impacts (2) (14)  
Other interest bearing liabilities/derivative related changes 2 (60)  
At the end of the financial year 17 58 68
Cross currency and interest rate swaps [member]      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
At the beginning of the financial year (557) (433)  
Settlements of debt related instruments   167  
Change from Net financing cash flows   167  
Other movements:      
Loss on bond repurchase   (184)  
Interest rate impacts 1,277 704  
Foreign exchange impacts 898 (796)  
Other interest bearing liabilities/derivative related changes 70 (15)  
At the end of the financial year $ 1,688 $ (557) $ (433)