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OTHER INVESTMENTS - Fair value of investments (Details) - At Fair Value [Member] - Rand Refinery Proprietary Limited ("Rand Refinery") [member] - ZAR (R) R in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Disclosure of fair value measurement of assets [line items]
Beginning balance	R 119.3	R 178.4
Fair value adjustment on equity investments at fair value through other comprehensive income	16.8	(59.1)
Ending balance	R 136.1	R 119.3

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- Definition

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

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- Definition

The amount of investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: At fair value [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2021-01-01
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- Definition

The gains (losses) including exchange differences recognised in other comprehensive income on the fair value measurement of assets. [Refer: At fair value [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2021-01-01
-Paragraph 93
-Subparagraph e
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2021-en-r&anchor=para_93_e_ii&doctype=Standard
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