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Property, plant and equipment- Capital commitments (Details) - ZAR (R)
R in Millions
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Capital commitments (excluding equity accounted investments)      
Capital commitments R 63,276 R 90,736 R 137,286
Property, plant and equipment      
Capital commitments (excluding equity accounted investments)      
Authorised and contracted for 179,172 154,739  
Authorised but not yet contracted for 40,687 61,673  
Capital commitments cumulative expenditure (156,583) (125,676)  
Capital commitments 63,276 90,736  
Capital commitments to sustain existing operations 26,925 23,850  
Capital commitments to expand operations R 36,351 R 66,886