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PROVISION FOR ENVIRONMENTAL REHABILITATION - Narrative (Details) - ZAR (R) R in Millions	Jun. 30, 2018	Jun. 30, 2017
Provision for decommissioning, restoration and rehabilitation costs [abstract]
Discount Rate	8.50%	8.80%
Inflation rate used in calculation of net present value of rehabilitation liability	5.70%	5.90%
Undiscounted rehabilitation cost	R 670.4	R 639.5

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- Definition

The inflation rate used in the current measurement of fair value less costs of disposal.

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- Definition

Undiscounted rehabilitation cost.

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