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FINANCE EXPENSE (Details) - ZAR (R)
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Disclosure of finance expense [abstract]      
Other Finance expenses R (4,000,000) R (5,700,000) R (4,600,000)
Unwinding of provision for environmental rehabilitation 45,600,000 46,500,000 43,000,000
Fair value adjustment on initial recognition of long-term receivable 8,800,000 0 0
Finance expense R (58,400,000) R (52,200,000) R (47,600,000)