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Accounting information and policies - Contribution of the Group's Venezuelan and Turkish operations (Details) | 12 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Türkiye |  |  |
Disclosure of geographical areas [line items] |  |  |
Movement in price index in hyperinflationary economy | 72.00% | 38.00% | 79.00%
Venezuela |  |  |
Disclosure of geographical areas [line items] |  |  |
Movement in price index in hyperinflationary economy | 77.00% | 382.00% | 268.00%
ARGENTINA |  |  |
Disclosure of geographical areas [line items] |  |  |
Movement in price index in hyperinflationary economy | 270.00% | 116.00% | 64.00%
GHANA |  |  |
Disclosure of geographical areas [line items] |  |  |
Movement in price index in hyperinflationary economy | 23.00% |  |

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