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Cost of Sales - Disclosure of impairment of assets (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | R 3,898 | R 5,336 | R 1,718
Tshepong operations |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 2,254 | 988 | 255
Recoverable amount | 5,866 | 7,426 | 7,780
Kusasalethu |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 690 | 579 | 678
Recoverable amount | 1,297 | 2,138 | 2,783
Target 1 |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 312 | 699 | 785
Recoverable amount | 1,076 | 1,217 | 1,996
Target 3 |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 318 | 0 | 0
Recoverable amount | 182 |  |
Joel |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 198 | 160 | 0
Recoverable amount | 852 | 876 |
Other mining assets |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 120 | 319 | 0
Recoverable amount | 335 | 366 |
Bambanani |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 6 | 0 | 0
Recoverable amount | 763 |  |
Doornkop |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 0 | 317 | 0
Recoverable amount |  | 2,730 |
Unisel |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 0 | 487 | 0
Recoverable amount |  | 38 |
Masimong |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 0 | 329 | 0
Recoverable amount |  | 58 |
Target North |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Impairment of assets | 0 | 1,458 | 0
Recoverable amount |  | 3,681 |
Life-of-Mine plan | Tshepong operations |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 3,811 | 4,279 | 4,931
Life-of-Mine plan | Kusasalethu |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 1,297 | 1,019 | 1,240
Life-of-Mine plan | Target 1 |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 467 | 471 | 867
Life-of-Mine plan | Joel |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 765 | 540 |
Life-of-Mine plan | Other mining assets |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 335 | 366 |
Life-of-Mine plan | Bambanani |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 763 |  |
Life-of-Mine plan | Doornkop |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount |  | 1,552 |
Life-of-Mine plan | Unisel |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount |  | 38 |
Life-of-Mine plan | Masimong |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount |  | 58 |
Resource base | Tshepong operations |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 2,055 | 3,147 | 2,849
Resource base | Kusasalethu |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 0 | 1,119 | 1,543
Resource base | Target 1 |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 609 | 746 | R 1,129
Resource base | Target 3 |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | 182 |  |
Resource base | Joel |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount | R 87 | 336 |
Resource base | Doornkop |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount |  | 1,178 |
Resource base | Target North |  |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |  |
Recoverable amount |  | R 3,681 |

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