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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, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities $ 20,718 $ 22,345  
Cash and cash equivalents 12,501 12,428 $ 17,236
USD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 15,203 16,289  
Cash and cash equivalents 4,445 5,925  
EUR [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 2,440 3,050  
Cash and cash equivalents 5 544  
GBP [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 1,613 1,587  
Cash and cash equivalents 711 674  
AUD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 1,265 1,233  
Cash and cash equivalents 3,840 1,797  
CAD [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 5 7  
Cash and cash equivalents 3,259 3,362  
Other [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Interest bearing liabilities 192 179  
Cash and cash equivalents $ 241 $ 126