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OTHER INVESTMENTS - Investments in other entities (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Investments in other entities R 180.4 R 168.6  
Fair value adjustment on equity instruments at fair value through OCI 11.8 17.2 R (15.7)
Dividends received on equity instruments at fair value through OCI (29.3) (78.3) R (71.5)
Listed investments (Fair value hierarchy Level 1)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Investments in other entities 7.5 7.2  
Unlisted investments (Fair value hierarchy Level 3)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Investments in other entities 172.9 161.4  
West Wits Mining Limited ("WWM")      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Fair value adjustment on equity instruments at fair value through OCI R 0.3 (3.5)  
West Wits Mining Limited ("WWM") | Listed investments (Fair value hierarchy Level 1)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Shares held in other entities (in shares) 47,812,500    
Investments in other entities R 7.5 7.2  
West Wits Mining Limited ("WWM") | Listed investments (Fair value hierarchy Level 1) | Top of range      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Percentage of interest held 2.10%    
West Wits Mining Limited ("WWM") | Listed investments (Fair value hierarchy Level 1) | Bottom of range      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Percentage of interest held 1.90%    
Rand Refinery Proprietary Limited ("Rand Refinery")      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Dividends received on equity instruments at fair value through OCI R (29.3) (77.4)  
Rand Refinery Proprietary Limited ("Rand Refinery") | At fair value      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Fair value adjustment on equity instruments at fair value through OCI R 10.5 20.2  
Rand Refinery Proprietary Limited ("Rand Refinery") | Unlisted investments (Fair value hierarchy Level 3)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Shares held in other entities (in shares) 44,438    
Percentage of interest held 11.30%    
Investments in other entities R 166.8 156.3  
Rand Mutual Assurance Company Limited      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Fair value adjustment on equity instruments at fair value through OCI 1.0 0.5  
Dividends received on equity instruments at fair value through OCI R 0.0 (0.9)  
Rand Mutual Assurance Company Limited | Unlisted investments (Fair value hierarchy Level 3)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Shares held in other entities (in shares) 12,659    
Percentage of interest held 1.30%    
Investments in other entities R 5.9 4.9  
Guardrisk Insurance Company Limited (Cell Captive A170) | Unlisted investments (Fair value hierarchy Level 3)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Shares held in other entities (in shares) 20    
Percentage of interest held 100.00%    
Investments in other entities R 0.1 0.1  
Chamber of Mines Building Company Proprietary Limited | Unlisted investments (Fair value hierarchy Level 3)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Shares held in other entities (in shares) 52,965    
Percentage of interest held 5.70%    
Investments in other entities R 0.1 R 0.1