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Long-term debt and finance leases - Maturity profile (Details) - ZAR (R)
R in Millions
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Maturity profile      
Total long-term debt R 137,339 R 109,454 R 81,405
Within one year      
Maturity profile      
Total long-term debt 2,544 12,763  
One to five years      
Maturity profile      
Total long-term debt 113,447 72,899  
More than five years      
Maturity profile      
Total long-term debt R 21,348 R 23,792