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PROVISION FOR ENVIRONMENTAL REHABILITATION (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Disclosure of other provisions [line items]      
Opening balance R 568.9 R 682.6  
Unwinding of provision 44.7 52.0 R 66.3
Change in estimate of environmental rehabilitation recognised in profit or loss (12.4) (21.9) (60.0)
Change in estimate of environmental rehabilitation cost recognised to decommissioning asset 26.4 (113.6)  
Environmental rehabilitation payments (56.8) (30.2)  
Closing balance 570.8 568.9 R 682.6
Environmental rehabilitation payments to reduce the liability (56.8) (30.2)  
Ongoing rehabilitation expenditure (48.3) (24.3)  
Total cash spent on environmental rehabilitation (105.1) (54.5)  
To reduce decommissioning liabilities [member]      
Disclosure of other provisions [line items]      
Environmental rehabilitation payments (51.0) (22.1)  
Environmental rehabilitation payments to reduce the liability (51.0) (22.1)  
To reduce restoration liabilities [member]      
Disclosure of other provisions [line items]      
Environmental rehabilitation payments (5.8) (8.1)  
Environmental rehabilitation payments to reduce the liability R (5.8) R (8.1)