Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions |
Jun. 30, 2025 |
Jun. 30, 2024 |
|---|---|---|
| Unrecognised deferred tax assets | ||
| Tax losses and tax credits | $ 10,159 | $ 9,126 |
| Total unrecognised deferred tax assets | 17,029 | 15,853 |
| Unrecognised deferred tax liabilities | ||
| Investments in subsidiaries | 2,349 | 2,307 |
| Total unrecognised deferred tax liabilities | 2,349 | 2,307 |
| Investments in subsidiaries [member] | ||
| Unrecognised deferred tax assets | ||
| Temporary differences | 1,681 | 1,533 |
| Mineral rights [member] | ||
| Unrecognised deferred tax assets | ||
| Temporary differences | 3,224 | 3,216 |
| Other deductible temporary differences [member] | ||
| Unrecognised deferred tax assets | ||
| Temporary differences | $ 1,965 | $ 1,978 |