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Segment Reporting - Summary of Geographical Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Disclosure of geographical areas [line items]      
Revenue $ 60,817 $ 42,931 $ 44,288
Non-current assets 82,234 84,262  
Restated balance [member]      
Disclosure of geographical areas [line items]      
Non-current assets     78,438
Unallocated assets [member]      
Disclosure of geographical areas [line items]      
Non-current assets 3,522 6,210 5,067
Australia [member]      
Disclosure of geographical areas [line items]      
Revenue 2,951 2,232 2,568
Non-current assets 48,612 48,236  
Australia [member] | Restated balance [member]      
Disclosure of geographical areas [line items]      
Non-current assets     45,963
Europe [member]      
Disclosure of geographical areas [line items]      
Revenue 1,050 1,156 1,875
China [member]      
Disclosure of geographical areas [line items]      
Revenue 39,727 26,576 24,274
Japan [member]      
Disclosure of geographical areas [line items]      
Revenue 4,808 3,904 4,193
India [member]      
Disclosure of geographical areas [line items]      
Revenue 2,189 1,475 2,479
South Korea [member]      
Disclosure of geographical areas [line items]      
Revenue 3,436 2,666 2,550
Rest of Asia [member]      
Disclosure of geographical areas [line items]      
Revenue 3,603 2,583 2,940
North America [member]      
Disclosure of geographical areas [line items]      
Revenue 2,432 1,827 2,442
Non-current assets 9,701 9,682 8,633
South America [member]      
Disclosure of geographical areas [line items]      
Revenue 426 315 662
Non-current assets 18,548 18,179 18,404
Rest of world [member]      
Disclosure of geographical areas [line items]      
Revenue 195 197 305
Non-current assets $ 1,851 $ 1,955 $ 371