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Long-term debt - Amortised cost summary (Details) - ZAR (R)
R in Millions
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Long-term debt      
Unamortised loan costs R (528) R (703)  
Total long-term debt 117,031 124,068 R 104,834
Secured Debt      
Long-term debt      
Long-term debt, before unamortised costs   29  
Unsecured debt      
Long-term debt      
Long-term debt, before unamortised costs R 117,559 R 124,742