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REVENUE - Market Risk (Details) - ZAR (R) R in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
US Dollar gold price sensitivity [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Percentage increase decrease in Rand gold price	20.00%	20.00%	20.00%
US Dollar gold price sensitivity [member] | Percentage decrease [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Gains (losses) from change in fair value of derivatives recognised in profit and loss	R (837.0)	R (552.4)	R (498.1)
US Dollar gold price sensitivity [member] | Percentage increase [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Gains (losses) from change in fair value of derivatives recognised in profit and loss	R 837.0	R 552.4	R 498.1
Rand to US Dollar exchange rate sensitivity [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Percentage increase decrease in Rand gold price	10.00%	10.00%	10.00%
Rand to US Dollar exchange rate sensitivity [member] | Percentage decrease [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Gains (losses) from change in fair value of derivatives recognised in profit and loss	R (418.5)	R (276.2)	R (249.0)
Rand to US Dollar exchange rate sensitivity [member] | Percentage increase [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Gains (losses) from change in fair value of derivatives recognised in profit and loss	R 418.5	R 276.2	R 249.0

X

- Definition

The reasonably possible percentage of the increase (decrease) market risk sensitivity.

+ References

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- Definition

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+ References

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- Definition

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 85
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-URIDate 2019-03-27

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