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Financial risk management and financial instruments - Currency Exposure (Details) - Exchange rate - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
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 1,709 R 754
Equity impact of decrease in risk exposure 171 75
Income statement impact of decrease in risk exposure 171 75
Euro | External balances    
Financial risk management and financial instruments    
Net exposure on assets 3,950 3,379
Net exposure on liabilities (227) (302)
Net exposure 3,723 3,077
Euro | Balances between group companies    
Financial risk management and financial instruments    
Net exposure (2,014) (2,323)
US Dollar    
Financial risk management and financial instruments    
Net exposure 27,401 12,086
Equity impact of decrease in risk exposure 2,740 1,209
Income statement impact of decrease in risk exposure 2,740 1,209
US Dollar | External balances    
Financial risk management and financial instruments    
Net exposure on assets 4,581 5,731
Net exposure on liabilities (2,949) (2,129)
Net exposure 1,632 3,602
US Dollar | Balances between group companies    
Financial risk management and financial instruments    
Net exposure 25,769 8,484
Trade and other payables | Euro | External balances    
Financial risk management and financial instruments    
Net exposure on liabilities (227) (302)
Trade and other payables | US Dollar | External balances    
Financial risk management and financial instruments    
Net exposure on liabilities (2,949) (2,129)
Long-term receivables | Euro | External balances    
Financial risk management and financial instruments    
Net exposure on assets 67  
Long-term receivables | US Dollar | External balances    
Financial risk management and financial instruments    
Net exposure on assets 745 339
Trade and other receivables | Euro | External balances    
Financial risk management and financial instruments    
Net exposure on assets 564 544
Trade and other receivables | US Dollar | External balances    
Financial risk management and financial instruments    
Net exposure on assets 2,595 3,520
Cash and cash equivalents | Euro | External balances    
Financial risk management and financial instruments    
Net exposure on assets 3,319 2,835
Cash and cash equivalents | US Dollar | External balances    
Financial risk management and financial instruments    
Net exposure on assets R 1,241 R 1,872