Segment Reporting - Summary of Reportable Segments (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Disclosure of reportable segments [line items] | |||
| Exceptional items | $ 32,319 | $ 36,750 | $ 31,873 |
| Impairment loss | 261 | 3,890 | |
| Reversal of impairment loss recognised in profit or loss | 90 | ||
| Samarco dam failure [member] | |||
| Disclosure of reportable segments [line items] | |||
| Exceptional items | 211 | 139 | 103 |
| Impairment of Western Australia Nickel assets [member] | |||
| Disclosure of reportable segments [line items] | |||
| Impairment loss | 3,800 | 0 | |
| Western Australia Nickel (WAN) temporary suspension [member] | |||
| Disclosure of reportable segments [line items] | |||
| Reversal of impairment loss recognised in profit or loss | 90 | ||
| Group and unallocated items/eliminations [member] | Samarco dam failure [member] | |||
| Disclosure of reportable segments [line items] | |||
| Exceptional items | $ 135 | $ 105 | $ 64 |