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Revenue - Summary of Revenue by Segment and Asset (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure of reportable segments [line items] |  |  |
Revenue | $ 55,658 | $ 53,817 | $ 65,098
Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 55,658 | 53,817 | 65,098
Operating segments [member] | Copper [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 18,566 | 16,027 | 16,849
Operating segments [member] | Copper [member] | Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 18,566 | 16,027 | 16,849
Operating segments [member] | Copper [member] | Escondida [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 10,013 | 8,847 | 9,500
Operating segments [member] | Copper [member] | Pampa Norte [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 2,375 | 2,491 | 2,670
Operating segments [member] | Copper [member] | Copper South Australia [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 4,085 | 2,806 | 1,776
Operating segments [member] | Copper [member] | Third party products [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 2,021 | 1,863 | 2,903
Operating segments [member] | Copper [member] | Other [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 72 | 20 |
Operating segments [member] | Iron Ore [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 27,952 | 24,812 | 30,767
Operating segments [member] | Iron Ore [member] | Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 27,952 | 24,812 | 30,767
Operating segments [member] | Iron Ore [member] | Western Australia Iron Ore [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 27,805 | 24,678 | 30,632
Operating segments [member] | Iron Ore [member] | Third party products [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 25 | 21 | 19
Operating segments [member] | Iron Ore [member] | Other [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 122 | 113 | 116
Operating segments [member] | Coal [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 7,666 | 10,958 | 15,549
Operating segments [member] | Coal [member] | Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 7,666 | 10,958 | 15,549
Operating segments [member] | Coal [member] | BHP Mitsubishi Alliance [Member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 5,873 | 7,652 | 10,254
Operating segments [member] | Coal [member] | New South Wales Energy Coal [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,793 | 3,306 | 3,035
Operating segments [member] | Coal [member] | Other [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue |  |  | 2,260
Group and unallocated items/eliminations [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,474 | 2,020 | 1,933
Group and unallocated items/eliminations [member] | Revenue [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | $ 1,474 | $ 2,020 | $ 1,933

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