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Segment Report - Narrative (Details) | 12 Months Ended
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Jun. 30, 2019 ZAR (R) product | Jun. 30, 2018 ZAR (R) | Jun. 30, 2017 ZAR (R)
Disclosure of operating segments [line items] |  |  |
Number of economic products | product | 1 |  |
Additions other than through business combinations, property, plant and equipment | R 4,687,000,000 | R 4,280,000,000 | R 3,686,000,000
Operating segments |  |  |
Disclosure of operating segments [line items] |  |  |
Additions other than through business combinations, property, plant and equipment | 4,687,000,000 | 4,280,000,000 | 3,686,000,000
Foreign operations | Operating segments |  |  |
Disclosure of operating segments [line items] |  |  |
Additions other than through business combinations, property, plant and equipment | 1,591,000,000 | 1,563,000,000 | 1,335,000,000
Foreign operations | Operating segments | Hidden Valley |  |  |
Disclosure of operating segments [line items] |  |  |
Additions other than through business combinations, property, plant and equipment | 1,591,000,000 | 1,563,000,000 | 1,335,000,000
Capital expenditures, net of capitalised revenue |  | 2,609,000,000 |
Capitalised revenue | 0 | 1,046,000,000 | 0
Wafi-Golpu joint operation | Foreign operations |  |  |
Disclosure of operating segments [line items] |  |  |
Additions other than through business combinations, property, plant and equipment | R 350,000,000 | R 288,000,000 | R 197,000,000

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