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TRADE AND OTHER RECEIVABLES - Movement in the allowance for impairment in respect of trade and other receivables (Details) - ZAR (R)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Reconciliation Of Changes In Allowance Account For Credit Losses Of Financial Assets [Abstract]    
Opening balance R (9,700,000) R (11,100,000)
Net of impairments raised and bad debt recovered 500,000 1,400,000
Bad debt written off against related receivable 0 0
Closing balance R (9,200,000) R (9,700,000)