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Financial risk management and financial instruments - Currency Exposure (Details) - Foreign currency risk - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Financial risk management and financial instruments |  |
Percentage of change in significant exposure used for sensitivity analysis | 10.00% | 10.00%
Euro |  |
Financial risk management and financial instruments |  |
Net exposure | R 542 | R 171
Equity impact of decrease in risk exposure | 54 | 17
Income statement impact of decrease in risk exposure | 54 | 17
US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure | (21,429) | 10,614
Equity impact of decrease in risk exposure | (2,143) | 1,053
Income statement impact of decrease in risk exposure | (2,143) | 1,053
External balances | Euro |  |
Financial risk management and financial instruments |  |
Net exposure on assets | 1,985 | 2,843
Net exposure on liabilities | (308) | (281)
Net exposure | 1,677 | 2,562
External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on assets | 3,631 | 3,952
Net exposure on liabilities | (2,928) | (2,922)
Net exposure | 703 | 1,030
Balances between group companies | Euro |  |
Financial risk management and financial instruments |  |
Net exposure | (1,135) | (2,391)
Balances between group companies | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure | (22,132) | 9,584
Long-term debt | External balances | Euro |  |
Financial risk management and financial instruments |  |
Net exposure on liabilities | (122) | (153)
Long-term debt | External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on liabilities | (1,851) | (1,651)
Short-term debt | External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on liabilities |  | (23)
Trade and other payables | External balances | Euro |  |
Financial risk management and financial instruments |  |
Net exposure on liabilities | (186) | (128)
Trade and other payables | External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on liabilities | (1,077) | (1,248)
Trade and other receivables | External balances | Euro |  |
Financial risk management and financial instruments |  |
Net exposure on assets | 515 | 586
Trade and other receivables | External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on assets | 2,375 | 2,500
Cash and cash equivalents | External balances | Euro |  |
Financial risk management and financial instruments |  |
Net exposure on assets | 1,470 | 2,257
Cash and cash equivalents | External balances | US Dollar |  |
Financial risk management and financial instruments |  |
Net exposure on assets | R 1,256 | R 1,452

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