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Segment report - Base chemicals Segment (Details) - ZAR (R) R in Millions |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 01, 2020 | Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2020
Disclosure of operating segments |  |  |  |  |  |
EBIT |  |  |  | R 21,650 | R 9,853 | R (111,030)
Gemini HDPE LLC |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Proportion of equity interest disposed of | 50.00% |  |  | 50.00% |  |
Base Chemicals |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Increase (decrease) in foundation business sales volumes (excluding Polymers US products) (as a percent) |  |  |  | 8.00% |  |
Increase (decrease) in average sales price |  |  |  | (6.00%) |  |
Increase (decrease) in ethane price (as a percent) |  |  |  | 19.00% |  |
EBIT |  |  |  | R 3,624 | (1,488) | R (70,804)
Increase (decrease) in EBIT |  |  |  | R 5,112 |  |
Base Chemicals | Gemini HDPE LLC |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Proportion of equity interest disposed of | 50.00% |  |  |  |  |
Base Chemicals | Louisiana Integrated Polyethylene JV LLC |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Proportion of ownership interest in joint operation |  | 50.00% |  |  |  |
Base Chemicals | LCCP |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Proportion of equity interest disposed of |  | 50.00% |  | 50.00% |  |
EBIT |  |  |  | R (451) |  |
Base Chemicals | Polymer US |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Increase (decrease) in sales volume (as a percent) |  |  | (23.00%) | 15.00% |  |
Increase (decrease) in average sales price |  |  |  | (11.00%) |  |
Base Chemicals | US phenolics |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Impairment |  |  |  | R (438) |  |
Base Chemicals | Blends and Mining Chemicals and Methyl Isobutyl Ketone (MIBK) |  |  |  |  |  |
Disclosure of operating segments |  |  |  |  |  |
Impairment |  |  |  |  | R (465) |

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