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Long-term debt - Business segmentation (Details) - ZAR (R) R in Millions | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | --- | ---
Long-term debt |  |  |
Total long-term debt | R 109,454 | R 81,405 | R 79,877
Mining |  |  |
Long-term debt |  |  |
Total long-term debt | 679 | 1,360 |
Exploration And Production International |  |  |
Long-term debt |  |  |
Total long-term debt | 784 | 755 |
Energy |  |  |
Long-term debt |  |  |
Total long-term debt | 9,503 | 7,058 |
Base Chemicals |  |  |
Long-term debt |  |  |
Total long-term debt | 33,511 | 21,890 |
Performance Chemicals |  |  |
Long-term debt |  |  |
Total long-term debt | 28,119 | 18,037 |
Group Functions |  |  |
Long-term debt |  |  |
Total long-term debt | R 36,858 | R 32,305 |

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