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v3.19.3

Remeasurement Items affecting operating profit - Assumptions (Details) | 12 Months Ended
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Jun. 30, 2019 R / $ $ / gal $ / MMBTU $ / bbl R / T | Jun. 30, 2018 R / $ $ / gal $ / MMBTU $ / bbl R / T | Jun. 30, 2017 R / $ $ / gal $ / MMBTU $ / bbl R / T
Impairment assumptions |  |  |
Long-term average crude oil price (in USD/bbl) | $ / bbl | 71.17 | 73.91 | 74.29
Long-term average gas price (Henry Hub), excluding margins (real) (in USD/mmbtu) | $ / MMBTU | 3.44 | 3.49 | 3.69
Long-term average ethane price (nominal) (in US$/gal) | $ / gal | 0.3904 | 0.3742 | 0.4427
Long-term average ammonia price (in Rand/ton) | R / T | 4,258.54 | 5,807.46 | 6,392.85
Long-term average exchange rate (R/US$) | R / $ | 14.29 | 13.57 | 14.71
Future oil price period (in years) | 5 years | 5 years | 5 years
Future ammonia price period (in years) | 5 years | 5 years | 5 years
Future exchange rate period (in years) | 5 years | 5 years | 5 years
Future ethane price period (in years) | 10 years | 10 years | 10 years
Minimum |  |  |
Impairment assumptions |  |  |
Period over which management has projected cash flows | 5 years |  |
South Africa |  |  |
Impairment assumptions |  |  |
Growth rate - long-term producer price index | 5.50% | 5.50% | 5.50%
Weighted average cost of capital | 13.12% | 12.71% | 12.50%
Discount rate - risk adjusted | 13.12% | 12.71% | 12.50%
United States of America |  |  |
Impairment assumptions |  |  |
Growth rate - long-term producer price index | 2.00% | 2.00% | 2.00%
Weighted average cost of capital | 7.18% | 7.56% | 6.60%
Discount rate - risk adjusted | 7.18% | 7.56% | 6.60%
Europe |  |  |
Impairment assumptions |  |  |
Growth rate - long-term producer price index | 2.00% | 2.00% | 2.00%
Europe | Minimum |  |  |
Impairment assumptions |  |  |
Weighted average cost of capital | 7.18% | 7.68% | 6.60%
Discount rate - risk adjusted | 7.18% | 7.68% | 6.60%
Europe | Maximum |  |  |
Impairment assumptions |  |  |
Weighted average cost of capital | 9.48% | 9.35% | 8.22%
Discount rate - risk adjusted | 9.48% | 9.35% | 8.22%
Canada |  |  |
Impairment assumptions |  |  |
Growth rate - long-term producer price index | 2.00% | 2.00% | 2.00%
Weighted average cost of capital | 7.18% | 7.68% | 6.60%
Discount rate - risk adjusted | 10.00% | 10.00% |
Canada | Minimum |  |  |
Impairment assumptions |  |  |
Discount rate - risk adjusted |  |  | 9.50%
Canada | Maximum |  |  |
Impairment assumptions |  |  |
Discount rate - risk adjusted |  |  | 9.80%

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