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FINANCE INCOME (Details) - ZAR (R)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Analysis Of Income And Expense [Abstract]      
Interest on loans and receivables R 21,800,000 R 23,600,000  
Growth in environmental rehbilitation trust funds 7,500,000 7,500,000 R 6,500,000
Growth in reimbursive right (8,800,000) (8,900,000) (8,000,000)
Unwinding of long term receivables 700,000    
Finance income R 38,800,000 R 40,000,000 R 36,800,000