Other investments - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disclosure of financial assets [line items] | |||
| Impairment charged during the year | $ (40) | $ (72) | |
| Loan provided by subsidiary | 21 | 39 | $ 94 |
| Loans | |||
| Disclosure of financial assets [line items] | |||
| Impairment charged during the year | (40) | (63) | |
| Loan provided by subsidiary | 15 | 11 | 63 |
| Customers and third parties | |||
| Disclosure of financial assets [line items] | |||
| Allowances of loans made to customers and other third parties | 136 | 137 | 138 |
| Customers and third parties | Loans | |||
| Disclosure of financial assets [line items] | |||
| Loan provided by subsidiary | 15 | 11 | 6 |
| Associates | Loans | |||
| Disclosure of financial assets [line items] | |||
| Loan provided by subsidiary | $ 2 | $ 0 | $ 57 |