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DERIVATIVES AND RISK MANAGEMENT (Non-designated Hedges) (Details) - Jul. 01, 2017 - Forward Contracts - Forward contracts not designated as hedging instruments
ZAR in Millions, $ in Millions
USD ($)
ZAR
Derivative [Line Items]    
Fair value of designated forward contracts | $ $ 2.4  
Hedged amount | ZAR   ZAR 31.7