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INVESTMENTS IN REHABILITATION AND OTHER FUNDS - Environmental obligations (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Changes in investments in rehabilitation obligation funds movement [abstract]      
Cash and cash equivalents in environmental rehabilitation trust funds R 0.0 R 0.0 R 564.7
Opening balance 0.0 564.7  
Transfer to Investment in Guardrisk Cell Captive 0.0 (579.5)  
Growth 0.0 14.8  
Reimbursive right for environmental rehabilitation guarantees 0.0 0.0 87.5
Opening balance 0.0 87.5  
Lapsing of old environmental rehabilitation policy retained in Guardrisk Cell Captive 0.0 (89.3)  
Growth 0.0 1.8  
Investment in Guardrisk Cell Captive 789.7 710.8 0.0
Opening balance 710.8 0.0  
Transfer to Guardrisk cell captive 0.0 668.8  
Contributions 28.4 28.9  
Growth 50.5 13.1 R 0.0
Investments in rehabilitation and other funds 789.7 710.8  
Environmental rehabilitation      
Changes in investments in rehabilitation obligation funds movement [abstract]      
Investments in rehabilitation and other funds 630.6 589.8  
Directors’ and Officers’ insurance      
Changes in investments in rehabilitation obligation funds movement [abstract]      
Investments in rehabilitation and other funds 61.3 29.5  
Other funds      
Changes in investments in rehabilitation obligation funds movement [abstract]      
Investments in rehabilitation and other funds R 97.8 R 91.5