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Equity - Schedule of allotted and fully paid share capital (Details) - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure of reserves within equity [line items] |  |  |  |  |
Number of shares (in shares) | 2,432 | 2,460 |  | 2,498 |
Nominal value | $ 887 | $ 898 | [1] | $ 875 | [1]
Shares cancelled | $ (997) | (1,543) |  | (3,004) |
Share capital |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |
Retranslation impact of opening balances |  | $ 36 |  |  |
Shares cancelled (number) | (28) | (38) |  |  |
Shares cancelled | $ (11) | $ (13) |  | $ (24) |
[1] | (1) See pages 238-240 for an explanation under Accounting information and policies.

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