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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, 2023
Jun. 30, 2022
Jun. 30, 2021
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities $ 22,345 $ 16,428  
Cash and cash equivalents 12,428 17,236 $ 15,246
USD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 16,289 8,813  
Cash and cash equivalents 5,925 7,654  
EUR [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 3,050 3,463  
Cash and cash equivalents 544 2,656  
GBP [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 1,587 2,621  
Cash and cash equivalents 674 30  
AUD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 1,233 783  
Cash and cash equivalents 1,797 3,360  
CAD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 7 584  
Cash and cash equivalents 3,362 3,437  
Other [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 179 164  
Cash and cash equivalents $ 126 $ 99