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Going concern - Timing and success of asset disposals (Details) R in Millions, $ in Millions |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 01, 2020 | Jan. 31, 2021 USD ($) | Jan. 31, 2021 ZAR (R) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 ZAR (R) | Dec. 31, 2019 ZAR (R) | Jun. 30, 2020 ZAR (R) | Dec. 31, 2020 ZAR (R)
Going concern |  |  |  |  |  |  |  |  |  |
Proceeds on disposals | [1] |  |  |  |  |  | R 33,963 | R 2,032 | R 4,285 |
Sale and purchase agreements concluded |  | $ 750 |  |  |  | $ 750 |  |  |  | R 11,000
Disposal groups held-for-sale |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Net assets held for sale |  |  |  |  |  |  |  |  |  | 12,100
Syndicated loan |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  | 1,000 | 15,500 |  |  |
RCF |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  |  |  | 840 | 12,300 |  |  |
RCF | Revolving credit facility repayments |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Repayments of borrowings |  |  |  | $ 250 | R 3,700 |  |  |  |  |
Term loan, maturing in November 2021 |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Notional amount |  | $ 150 |  |  |  | $ 150 |  |  |  | R 2,200
Gemini HDPE LLC |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Proceeds on disposals |  |  |  |  |  |  | R 5,900 |  |  |
Proportion of equity interest disposed of |  | 50.00% |  |  |  | 50.00% | 50.00% |  |  |
Base Chemicals | Gemini HDPE LLC |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Proportion of equity interest disposed of |  | 50.00% |  |  |  |  |  |  |  |
Base Chemicals | LCCP |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Proceeds on disposals |  |  |  |  |  |  | R 30,200 |  |  |
Proportion of equity interest disposed of |  |  | 50.00% |  |  | 50.00% | 50.00% |  |  |
US Base Chemicals and Gemini HDPE LLC |  |  |  |  |  |  |  |  |  |
Going concern |  |  |  |  |  |  |  |  |  |
Proceeds on disposals |  |  |  |  |  | $ 2,400 | R 33,000 |  |  |
[1] | Includes proceeds received from the disposal of a portion of our US LCCP Base Chemicals business, as well as our 50% equity interest in the Gemini HDPE LLC (approximately R33 billion

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