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Cost of Sales - Disclosure of production costs (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Analysis of income and expense [abstract] |  |  |
Labour costs, including contractors | R 12,715 | R 9,750 | R 9,006
Consumables | 5,532 | 3,418 | 3,614
Water and electricity | 3,398 | 2,551 | 2,316
Insurance | 126 | 86 | 91
Transportation | 354 | 121 | 177
Change in inventory | (166) | (211) | 370
Capitalisation of mine development costs | (1,880) | (1,552) | (1,321)
Stripping activities | (1,197) | (167) | (77)
Royalty expense | 193 | 121 | 211
Other | 1,249 | 967 | 655
Total production costs | R 20,324 | R 15,084 | R 15,042

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