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Assets under construction - Business segmentation and cash flow (Details) - ZAR (R) R in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Assets Under Construction [Line Items] |  |  |
Total operations | R 165,361 | R 130,734 |
Current year additions | 52,806 | 60,312 | R 70,849
Adjustments for non-cash items | (171) | (420) | (1,427)
cash flow hedge accounting | 1 | (2) | (2)
movement in environmental provisions capitalised | (172) | (418) | (1,425)
Per the statement of cash flows | 52,635 | 59,892 | R 69,422
Mining |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | 2,095 | 1,141 |
Exploration And Production International |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | 6,457 | 6,256 |
Energy |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | 5,993 | 9,064 |
Base Chemicals |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | 75,099 | 59,908 |
Performance Chemicals |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | 75,144 | 54,006 |
Group Functions |  |  |
Assets Under Construction [Line Items] |  |  |
Total operations | R 573 | R 359 |

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- Definition The amount of expenditure capitalised during the construction of non-current assets that are not yet available for use. [Refer: Non-current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2017-01-01 -Paragraph 37 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_37&doctype=Standard -URIDate 2017-03-09 + Details
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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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