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Segment Reporting - Summary of Geographical Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of geographical areas [line items] |  |  |
Revenue | $ 42,931 | $ 44,288 | $ 43,129
Non-current assets | 83,312 | 77,488 | 76,863
Unallocated assets [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Non-current assets | 6,210 | 5,067 | 5,039
Australia [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 2,232 | 2,568 | 2,304
Non-current assets | 47,286 | 45,013 | 45,157
Europe [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 1,156 | 1,875 | 1,886
China [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 26,576 | 24,274 | 22,660
Japan [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 3,904 | 4,193 | 4,628
India [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 1,475 | 2,479 | 2,439
South Korea [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 2,666 | 2,550 | 2,588
Rest of Asia [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 2,583 | 2,940 | 2,620
North America [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 1,827 | 2,442 | 2,715
Non-current assets | 9,682 | 8,633 | 8,246
South America [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 315 | 662 | 1,054
Non-current assets | 18,179 | 18,404 | 18,267
Rest of world [member] |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 197 | 305 | 235
Non-current assets | $ 1,955 | $ 371 | $ 154

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