Related party transactions - Directors remuneration (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of transactions between related parties [line items] | |||
| Salaries and short-term employee benefits | $ 14 | $ 14 | $ 12 |
| Annual incentive plan | 8 | 8 | 4 |
| Non-Executive Directors' fees | 2 | 2 | 2 |
| Post-employment benefits | 2 | 2 | 2 |
| Directors | |||
| Disclosure of transactions between related parties [line items] | |||
| Salaries and short-term employee benefits | 3 | 4 | 4 |
| Annual incentive plan | 2 | 3 | 1 |
| Non-Executive Directors' fees | 2 | 2 | 2 |
| Shares vesting | 2 | 4 | 18 |
| Directors remuneration | $ 9 | $ 13 | $ 25 |