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v3.21.1

PROVISION FOR ENVIRONMENTAL REHABILITATION (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of other provisions [line items] |  |
Inflation rate | 1.49% | 1.42%
Provision for decommissioning, restoration and rehabilitation costs [Member] |  |
Disclosure of other provisions [line items] |  |
Risk-free discount rate | 1.63% | 1.93%
Nominal Risk-Free Rate | 2.86% | 3.05%
Provision for decommissioning, restoration and rehabilitation costs [Member] | Bottom of range [member] |  |
Disclosure of other provisions [line items] |  |
Investment grade corporate bonds | 50 years |
Provision for decommissioning, restoration and rehabilitation costs [Member] | Top of range [Member] |  |
Disclosure of other provisions [line items] |  |
Beyond current mine life | 100 years |
Investment grade corporate bonds | 100 years |

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