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Share Capital - Treasury shares (Details) - shares | Jun. 30, 2019 | Feb. 20, 2019 | Jan. 15, 2019 | Jun. 30, 2018
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Lydenburg Exploration Limited | Ordinary shares | Subsidiaries |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) | 335 |  |  | 335
Kalgold Share Trust | Ordinary shares | Share trust controlled by entity |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) | 47,046 |  |  | 47,046
Harmony ESOP Trust | Share trust controlled by entity |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) |  |  | 6,700,000 |
Harmony ESOP Trust | Ordinary shares | Share trust controlled by entity |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) | 6,592,900 |  |  | 0
Harmony Gold Community Trust | Convertible preference shares | Share trust controlled by entity |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) | 4,400,000 | 4,400,000 |  | 0

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