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Turnover (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Turnover      
Sale of products R 178,463 R 169,115 R 170,830
Services rendered 1,612 1,549 1,695
Other trading income 1,386 1,743 417
Total revenue R 181,461 R 172,407 R 172,942