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Deferred tax - Calculated tax losses carried forward (Details) - ZAR (R) R in Millions | Jun. 30, 2018 | Jun. 30, 2017
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Calculated tax losses carried forward that have not been recognised | R 17,621 | R 18,150
Between three and five years |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Calculated tax losses carried forward that have not been recognised | 376 |
More than five years |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Calculated tax losses carried forward that have not been recognised | 16,826 | 17,920
Indefinite Life |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Calculated tax losses carried forward that have not been recognised | R 419 | R 230

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- Definition 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. + References No definition available. + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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