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Segments - Operating business units (Details) l in Billions |  | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018 segment Bcf l
Disclosure of operating segments [line items] |  |
Number of Reportable Segments | segment |  | 6
ORYX GTL |  |
Disclosure of operating segments [line items] |  |
Interest in joint ventures (as a percent) | 49.00% |
Escravos GTL |  |
Disclosure of operating segments [line items] |  |
Interest in associates (as a percent) | 10.00% |
Energy | ORYX GTL |  |
Disclosure of operating segments [line items] |  |
Interest in joint ventures (as a percent) |  | 49.00%
Energy | Escravos GTL |  |
Disclosure of operating segments [line items] |  |
Interest in associates (as a percent) |  | 10.00%
Energy | South Africa |  |
Disclosure of operating segments [line items] |  |
Annual sales of liquid fuels | l |  | 9
Annual sales of natural and methane-rich gas | Bcf |  | 55

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