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Long-term debt and finance leases - Business segmentation (Details) - ZAR (R) R in Millions | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
--- | --- | --- | ---
Long-term debt |  |  |
Total long-term debt | R 137,339 | R 109,454 | R 81,405
Mining |  |  |
Long-term debt |  |  |
Total long-term debt |  | 679 |
Exploration And Production International |  |  |
Long-term debt |  |  |
Total long-term debt |  | 784 |
Energy |  |  |
Long-term debt |  |  |
Total long-term debt | 8,893 | 9,503 |
Base Chemicals |  |  |
Long-term debt |  |  |
Total long-term debt | 5,503 | 33,716 |
Performance Chemicals |  |  |
Long-term debt |  |  |
Total long-term debt | 1,466 | 27,914 |
Group Functions |  |  |
Long-term debt |  |  |
Total long-term debt | R 121,477 | R 36,858 |

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