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Going concern - Solvency and Liquidity (Details) R in Millions |  | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 ZAR (R) $ / bbl | Jun. 30, 2021 R / $ $ / bbl | Jun. 30, 2022 R / $ $ / bbl | Jun. 30, 2023 | Jun. 30, 2020 ZAR (R) | Dec. 31, 2019 ZAR (R) | [1] | Jun. 30, 2019 ZAR (R)
Going concern |  |  |  |  |  |  |  |  |
Cash and cash equivalents | R 27,608 | [1] |  |  |  | R 34,094 | [1] | R 12,670 | R 15,819
Available facilities | R 27,000 |  |  |  |  | R 10,500 |  |  |
Net Debt To EBITDA Ratio | 2.6 |  |  |  |  | 4.3 |  |  |
Covenant level of net debt to EBITDA | 4.0 |  |  |  |  |  |  |  |
Cash flow forecast period following the reporting date | 9 months |  |  |  |  |  |  |  |
Brent crude oil price per unit | $ / bbl | 45 |  |  |  |  |  |  |  |
Working capital percentage | 14.90% |  |  |  |  |  |  |  |
Announced asset divestment proceeds | R 3,300 |  |  |  |  |  |  |  |
Forecast |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |
Brent crude oil price per unit | $ / bbl |  |  | 45.50 | 53.58 |  |  |  |  |
Average foreign exchange rate | R / $ |  |  | 14.83 | 15.10 |  |  |  |  |
Working capital percentage |  |  | 15.60% |  | 14.00% |  |  |  |
[1] | Includes bank overdraft.

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