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Share capital - Shares Issued Roll Forward (Details) - shares
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Reconciliation of number of shares outstanding      
Shares issued at beginning of year 640,667,612 635,676,817 634,244,336
Issued in terms of employee share schemes 7,807,492 4,990,795 1,432,481
Shares issued at end of year 648,475,104 640,667,612 635,676,817