v3.26.3
OTHER INVESTMENTS - Fair value of investments (Details) - At fair value - Rand Refinery Proprietary Limited ("Rand Refinery") - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of fair value measurement of assets [line items]    
Balance at the beginning of the year R 302.0 R 166.8
Fair value adjustment on equity investments at fair value through OCI R 220.6 135.2
Balance at the end of the year   R 302.0