Post employment benefits - Balance sheet analysis of post employment plans (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Disclosure of defined benefit plans [line items] | ||
| Non-current assets | $ 1,006 | $ 1,161 |
| Non-current liabilities | (387) | (409) |
| Surplus restriction | 8 | 5 |
| Funded plans | ||
| Disclosure of defined benefit plans [line items] | ||
| Non-current assets | 1,006 | 1,161 |
| Non-current liabilities | (141) | (146) |
| Unfunded plans | ||
| Disclosure of defined benefit plans [line items] | ||
| Non-current liabilities | $ (246) | $ (263) |