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Revenue - Summary of Revenue by Segment and Asset (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure of reportable segments [line items] |  |  |
Revenue | $ 55,658 | $ 53,817 | $ 65,098
Group and unallocated items/eliminations [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,474 | 2,020 | 1,933
Only copper [member] | Copper [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 17,229 | 14,902 | 15,992
Other metals [member] | Copper [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,337 | 1,125 | 857
Steelmaking Coal [member] | Coal [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 5,793 | 7,430 | 11,990
Thermal coal [member] | Coal [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,873 | 3,528 | 3,559
Western Australia Nickel [member] | Group and unallocated items/eliminations [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,473 | 2,009 | 1,926
Other revenue [member] | Group and unallocated items/eliminations [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | $ 1 | $ 11 | $ 7

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