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Net Debt - Summary of Interest Bearing Liabilities and Cash and Cash Equivalents Denominated by Currency (Detail) - USD ($)
$ in Millions
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities $ 16,428 $ 20,983  
Cash and cash equivalents 17,236 15,246 $ 13,426
USD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 8,813 11,146  
Cash and cash equivalents 7,654 12,003  
EUR [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 3,463 4,505  
Cash and cash equivalents 2,656 4  
GBP [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 2,621 3,415  
Cash and cash equivalents 30 32  
AUD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 783 1,053  
Cash and cash equivalents 3,360 573  
CAD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 584 635  
Cash and cash equivalents 3,437 2,455  
Other [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 164 229  
Cash and cash equivalents $ 99 $ 179