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FINANCIAL ASSETS (Details) - ZAR (R) R in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Disclosure of financial assets [line items]
Fair value gains (losses) on financial assets reclassified out of available-for-sale financial assets recognised in other comprehensive income	R 0.6	R (0.3)
West Wits Mining Limited ("WWM") [member][Member] | Level 1 of fair value hierarchy [member]
Disclosure of financial assets [line items]
Investments in other entities	R 9.2	8.6
Shares held in other entities	47,812,500
Percentage of interest held	6.70%
Rand Refinery Proprietary Limited ("Rand Refinery") [member] | Level 3 of fair value hierarchy [member]
Disclosure of financial assets [line items]
Investments in other entities	R 0.0	0.0
Shares held in other entities	44,438
Percentage of interest held	11.00%
Guardrisk Insurance Company Limited (Cell Captive A170) [member] | Top of range [member]
Disclosure of financial assets [line items]
Perecentage of entitlement to reimbursive right	100.00%
Guardrisk Insurance Company Limited (Cell Captive A170) [member] | Level 3 of fair value hierarchy [member] | Class A Shares [Member]
Disclosure of financial assets [line items]
Investments in other entities	R 0.1	0.1
Shares held in other entities	20
Chamber of Mines Building Company Proprietary Limited [member] | Level 3 of fair value hierarchy [member]
Disclosure of financial assets [line items]
Investments in other entities	R 0.1	R 0.1
Shares held in other entities	30,160
Percentage of interest held	3.00%

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- Definition

The percentage that entitles the holder to the residual net equity of the Cell Captive A 170 after settlement of the reimbursive right.

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The fair value gains (losses) recognised in other comprehensive income on financial assets reclassified out of the available-for-sale category. [Refer: Financial assets available-for-sale; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
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- Definition

The amount of non-derivative financial assets that are designated as available for sale or are not classified as (a) loans and receivables; (b) held-to-maturity investments; or (c) financial assets at fair value through profit or loss. [Refer: Derivative financial assets; Financial assets at fair value through profit or loss; Held-to-maturity investments]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
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-IssueDate 2017-01-01
-Paragraph 8
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The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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