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PROVISION FOR ENVIRONMENTAL REHABILITATION - Narrative (Details) - ZAR (R)
R in Millions
Jun. 30, 2023
Jun. 30, 2022
Provision for decommissioning, restoration and rehabilitation costs [abstract]    
Discount rate, minimum 10.80% 10.20%
Discount rate, maximum 11.10% 10.30%
Inflation rate used in calculation of net present value of rehabilitation liability 5.70% 5.50%
Undiscounted rehabilitation cost R 897.8 R 815.1