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Financial risk management and financial instruments - Significant Exchange Rates (Details) | 12 Months Ended |  |
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Jun. 30, 2019 R / $ | Jun. 30, 2019 R / $ R / € | Jun. 30, 2018 R / $ | Jun. 30, 2018 R / $ R / € | Jun. 30, 2019 R / € | Jun. 30, 2018 R / €
Financial risk management and financial instruments |  |  |  |  |  |
Average rate | 14.20 | 16.19 | 12.85 | 15.34 |  |
Closing rate | 14.08 | 14.08 | 13.73 | 13.73 | 16.01 | 16.04

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- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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- References No definition available. + Details
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