v3.26.3
OTHER INVESTMENTS - Investments in other entities (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Investments in other entities R 567.0 R 322.5  
Fair value adjustment on equity instruments at fair value through OCI 244.4 139.8 R 11.8
Dividends received on equity instruments at fair value
through OCI 0.0 (56.3) R (29.3)
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 545.0 311.3  
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 10.8 3.6  
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 22.0 R 11.2  
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   1.50%  
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 1.20%    
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 0.0 R (56.3)  
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    
Investments in other entities R 522.6 302.0  
Percentage of interest held 11.30%    
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 R 13.0 1.0  
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    
Investments in other entities R 19.9 6.8  
Percentage of interest held 1.30%    
Guardrisk Insurance Company Limited (Cell Captive A170)      
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [line items]      
Percentage of interest held 100.00%    
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    
Investments in other entities R 2.4 2.4  
Percentage of interest held 100.00%    
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    
Investments in other entities R 0.1 R 0.1  
Percentage of interest held 5.70%