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Inventories- segmentation (Details) - ZAR (R)
R in Millions
12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Inventories    
Inventories R 29,364 R 25,374
Inventory write-down 234 470
Inventories encumbered 4,099 3,165
Inventories held at net realizable value 1,348 3,015
Mining    
Inventories    
Inventories 1,661 1,514
Exploration And Production International    
Inventories    
Inventories 144 155
Energy    
Inventories    
Inventories 7,680 6,912
Base Chemicals    
Inventories    
Inventories 6,682 5,975
Performance Chemicals    
Inventories    
Inventories 13,162 10,762
Group Functions    
Inventories    
Inventories R 35 R 56