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Financial risk management and financial instruments - Significant Exchange Rates (Details)
12 Months Ended
Jun. 30, 2024
R / €
Jun. 30, 2024
R / $
R / €
Jun. 30, 2023
R / €
Jun. 30, 2023
R / $
R / €
Jun. 30, 2024
R / $
Jun. 30, 2023
R / $
Financial risk management and financial instruments            
Average rate 20.24 18.71 18.62 17.77    
Closing rate 19.49 19.49 20.55 20.55 18.19 18.83