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Long-term debt - Summary (Details) - ZAR (R)
R in Millions
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Long-term debt.      
Total long-term debt R 102,643 R 167,197 R 129,569
Short-term portion (5,506) (19,686)  
Long-term debt R 97,137 R 147,511 R 127,350