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TRADE AND OTHER RECEIVABLES - Movement in the allowance for impairment in respect of trade and other receivables (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Opening balance R (2.6) R (4.9)
Credit loss allowance/impairments recognised included in operating costs (0.2) (0.2)
Credit loss allowance/impairments reversed included in operating costs 1.3 0.4
Credit loss allowance written off against related receivable 0.3 2.1
Closing balance R (1.2) R (2.6)