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Significant events and transactions since 30 June 2019 (Details) - item |  |  | 6 Months Ended
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 01, 2020 | Dec. 31, 2020
Secunda Synfuels Operations Air Separation Units |  |  |
Events and transactions since prior financial year-end |  |  |
Number of air separation units to be sold | 16 |  | 16
Investment in Republic of Mozambique Pipeline Investment Company (Pty) Ltd (ROMPCO) |  |  |
Events and transactions since prior financial year-end |  |  |
Percentage of interest held for sale | 50.00% |  | 50.00%
Investment in Central Termica De Ressane Garcia S.A. (CTRG) |  |  |
Events and transactions since prior financial year-end |  |  |
Percentage of interest held for sale | 100.00% |  | 100.00%
Etame Marin block offshore Gabon |  |  |
Events and transactions since prior financial year-end |  |  |
Percentage of interest held for sale | 27.80% |  | 27.80%
Block DE-8 offshore Gabon |  |  |
Events and transactions since prior financial year-end |  |  |
Percentage of interest held for sale | 40.00% |  | 40.00%
Gemini HDPE LLC |  |  |
Events and transactions since prior financial year-end |  |  |
Proportion of equity interest disposed of | 50.00% |  | 50.00%
Base Chemicals | Louisiana Integrated Polyethylene JV LLC |  |  |
Events and transactions since prior financial year-end |  |  |
Proportion of ownership interest in joint operation |  | 50.00% |
Base Chemicals | Gemini HDPE LLC |  |  |
Events and transactions since prior financial year-end |  |  |
Proportion of equity interest disposed of | 50.00% |  |
Base Chemicals | Lake Charles Chemicals Project |  |  |
Events and transactions since prior financial year-end |  |  |
Proportion of equity interest disposed of |  | 50.00% | 50.00%

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