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Segment Reporting - Summary of Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure of reportable segments [line items] |  |  |
Exceptional impairment losses | $ 6,600 | $ 340 | $ 620
Exceptional items | (36,750) | (31,873) | (32,371)
Samarco dam failure [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Exceptional impairment losses | 3,677 | 340 | 1,032
Exceptional items | (139) | (103) | (66)
Impairment of Western Australia Nickel assets [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Exceptional impairment losses | 3,800 | 0 | 0
Group and unallocated items/eliminations [member] | Samarco dam failure [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Exceptional items | $ (105) | $ (64) | $ (13)

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