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Financial risk management and financial instruments - Derivatives Entered (Details) R in Millions, $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) MT $ / T $ / gal $ / bbl R / $ MMBbls | Jun. 30, 2018 ZAR (R) MT MMBbls | Jun. 30, 2017 USD ($) MT $ / T $ / bbl R / $ MMBbls | Jun. 30, 2017 ZAR (R) MT MMBbls | Jun. 30, 2018 ZAR (R) MT $ / T $ / gal $ / bbl R / $ MMBbls | Jun. 30, 2017 ZAR (R) MT $ / T $ / bbl R / $ MMBbls
Crude oil options |  |  |  |  |  |
Financial risk management and financial instruments |  |  |  |  |  |
Premium paid | $ | $ 207 |  | $ 103 |  |  |
Number of barrels | MMBbls | 98 | 98 | 55 | 55 |  |
Number of barrels - open positions | MMBbls | 48 |  | 25 |  | 48 | 25
Number of barrels - settled | MMBbls | 50 | 50 | 30 | 30 |  |
Average Brent crude oil price floor, net of costs (in USD per barrel) | $ / bbl | 53.36 |  | 48.15 |  | 53.36 | 48.15
Realised (losses)/gains recognised in the income statement |  | R (1,605) |  | R (732) |  |
Unrealised (losses)/gains recognised in the income statement |  | (1,698) |  | 495 |  |
Amount included in the statement of financial position |  |  |  |  | R 482 | R 1,116
Zero cost collar |  |  |  |  |  |
Financial risk management and financial instruments |  |  |  |  |  |
Contract/Notional amount | $ | $ 4,000 |  | $ 4,000 |  |  |
Annual average floor (in Rand per USD) | R / $ | 13.14 |  | 13.46 |  | 13.14 | 13.46
Annual average cap (in Rand per USD) | R / $ | 15.14 |  | 15.51 |  | 15.14 | 15.51
Realised (losses)/gains recognised in the income statement |  | 2,772 |  |  |  |
Unrealised (losses)/gains recognised in the income statement |  | R (1,836) |  | R 1,608 |  |
Amount included in the statement of financial position |  |  |  |  | R (338) | R 1,543
Coal swaps |  |  |  |  |  |
Financial risk management and financial instruments |  |  |  |  |  |
Number of tons hedged | MT | 4.20 | 4.20 | 3.93 | 3.93 |  |
Number of tons - open positions | MT | 1.40 |  | 2.10 |  | 1.40 | 2.10
Number of tons - settled | MT | 2.80 | 2.80 | 1.83 | 1.83 |  |
Average swap price | $ / T | 81.82 |  | 77.52 |  | 81.82 | 77.52
Realised (losses)/gains recognised in the income statement |  | R (618) |  | R 74 |  |
Unrealised (losses)/gains recognised in the income statement |  | R (406) |  | R 20 |  |
Amount included in the statement of financial position |  |  |  |  | R (414) | R 19
Ethane swaps |  |  |  |  |  |
Financial risk management and financial instruments |  |  |  |  |  |
Number of barrels | MMBbls | 5.80 | 5.80 |  |  |  |
Number of barrels - open positions | MMBbls | 3.50 |  |  |  | 3.50 |
Number of barrels - settled | MMBbls | 2.30 | 2.30 |  |  |  |
Average Brent crude oil price floor, net of costs (in USD per barrel) | $ / gal | 0.27 |  |  |  | 0.27 |
Realised (losses)/gains recognised in the income statement |  | R (1) |  |  |  |
Unrealised (losses)/gains recognised in the income statement |  | R 30 |  |  |  |
Amount included in the statement of financial position |  |  |  |  | R 33 |

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