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TRADE AND OTHER RECEIVABLES - Market Risk (Details)
R in Millions, $ in Millions
Jun. 30, 2021
USD ($)
Jun. 30, 2021
ZAR (R)
Jun. 30, 2020
USD ($)
Jun. 30, 2020
ZAR (R)
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Trade receivables   R 56.5   R 23.1
Currency Risk [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Percentage of reasonably possible change, market risk 20.00% 20.00%    
Strengthening of the Rand against the US Dollar   R 0.0   (2.3)
Weakening of the Rand against the US Dollar   R 0.0   R 2.3
Foreign denomination [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Trade receivables | $ $ 0.0   $ 1.3