Taxation - Unrecognised deferred tax assets (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||
| Unrecognised deferred tax assets | $ 183 | $ 193 |
| Capital losses – indefinite | ||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||
| Unrecognised deferred tax assets | 123 | 125 |
| Trading losses – indefinite | ||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||
| Unrecognised deferred tax assets | 41 | 42 |
| Trading and capital losses – expiry dates up to 2031 | ||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||
| Unrecognised deferred tax assets | $ 19 | $ 26 |