Significant Events - Summary of Financial Impacts of Samarco Dam Failure (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2023 |
|
| Disclosure of exceptional items [line items] | |||
| Funding provided during the period | $ (2,422) | ||
| Samarco dam failure one [Member] | |||
| Disclosure of exceptional items [line items] | |||
| Change in estimate | 540 | $ 3,700 | $ (33) |
| Exchange translation | 119 | (867) | 289 |
| Funding provided during the period | (125) | ||
| Utilisation | $ (1,773) | $ (515) | $ (448) |