Deferred Tax Balances - Summary of Movement in Net Deferred Tax Position (Parenthetical) (Detail) - USD ($) $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||||
| Income tax (charge)/credit recorded in the income statement | [1] | $ 320 | $ (177) | $ 988 | |
| Western Australia Nickel [Member] | |||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||||
| Income tax (charge)/credit recorded in the income statement | $ 1,125 | ||||
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