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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Disclosure of detailed information about property, plant and equipment [line items]      
Contractual commitments for acquisition of property, plant and equipment R 2,136.8 R 1,730.8  
Mine plant facilities and equipment | Bottom of range | Ergo      
Disclosure of detailed information about property, plant and equipment [line items]      
Useful lives 1 year 1 year 2 years
Mine plant facilities and equipment | Bottom of range | FWGR      
Disclosure of detailed information about property, plant and equipment [line items]      
Useful lives 1 year 2 years 2 years
Mine plant facilities and equipment | Top of range | Ergo      
Disclosure of detailed information about property, plant and equipment [line items]      
Useful lives 18 years 19 years 19 years
Mine plant facilities and equipment | Top of range | FWGR      
Disclosure of detailed information about property, plant and equipment [line items]      
Useful lives 17 years 18 years 20 years