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Net finance costs - Finance costs (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | R 6,613 | R 5,903 | R 4,916
Amortisation of loan costs |  | 725 | 462 | 279
Notional interest |  | 857 | 962 | 834
Total finance costs |  | 8,195 | 7,327 | 6,029
Amounts capitalised to assets under construction |  | (6,942) | (3,568) | (2,764)
Finance costs per income statement |  | 1,253 | 3,759 | 3,265
Total finance costs before amortisation of loan costs and notional interest |  | 6,613 | 5,903 | 4,916
Add: modification gain |  | 109 |  |
Less: interest accrued on long-term debt |  | (1,025) | (878) | (956)
Less: interest reversed/(accrued) on tax payable |  | 525 | (228) | (348)
Finance costs per the statement of cash flows | [1] | 6,222 | 4,797 | 3,612
Debt and interest rate swap |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | 6,088 | 4,166 | 3,463
Total finance costs before amortisation of loan costs and notional interest |  | 6,088 | 4,166 | 3,463
Secured and unsecured debt |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | 6,044 | 3,880 | 3,162
Total finance costs before amortisation of loan costs and notional interest |  | 6,044 | 3,880 | 3,162
Interest rate swaps |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | 44 | 286 | 301
Total finance costs before amortisation of loan costs and notional interest |  | 44 | 286 | 301
Preference shares |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | 116 | 963 | 989
Total finance costs before amortisation of loan costs and notional interest |  | 116 | 963 | 989
Finance leases |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | 871 | 483 | 86
Total finance costs before amortisation of loan costs and notional interest |  | 871 | 483 | 86
Other |  |  |  |
Disclosure of detailed information about borrowings |  |  |  |
Borrowing costs incurred before amortisation of loan costs and notional interest |  | (462) | 291 | 378
Total finance costs before amortisation of loan costs and notional interest |  | R (462) | R 291 | R 378
[1] | Included in finance costs paid is amounts capitalised to assets under construction. Refer note 18.

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2018-01-01 -Paragraph 26 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=23&date=2018-03-01&anchor=para_26_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds. + 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 amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_b&doctype=Standard -URIDate 2018-03-16 + Details
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