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Long-term provisions (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Provisions    
Balance at beginning of year R 17,727 R 18,779
Capitalised in property, plant and equipment and assets under construction 1,925 350
Reduction in capitalised rehabilitation provision (1) (1,433)
Transfer to held for sale liabilities (54)  
Per the income statement 430 (596)
additional provisions and changes to existing provisions 39 401
reversal of unutilised amounts (297) (194)
effect of change in discount rate 688 (803)
Notional interest 857 962
Utilised during year (cash flow) (1,099) (729)
Foreign exchange differences recognised in income statement 127 251
Translation of foreign operations 48 143
Balance at end of year 19,960 17,727
Environmental    
Provisions    
Balance at beginning of year 14,933 15,716
Capitalised in property, plant and equipment and assets under construction 1,925 350
Reduction in capitalised rehabilitation provision (1) (1,433)
Transfer to held for sale liabilities (51)  
Per the income statement 1,095 (756)
additional provisions and changes to existing provisions 415 241
reversal of unutilised amounts (8) (194)
effect of change in discount rate 688 (803)
Notional interest 849 953
Utilised during year (cash flow) (159) (249)
Foreign exchange differences recognised in income statement 109 225
Translation of foreign operations 42 127
Balance at end of year 18,742 14,933
Share-based payments    
Provisions    
Balance at beginning of year 1,101 885
Per the income statement (440) 655
additional provisions and changes to existing provisions (440) 655
Utilised during year (cash flow) (397) (437)
Foreign exchange differences recognised in income statement   (1)
Translation of foreign operations   (1)
Balance at end of year 264 1,101
Other    
Provisions    
Balance at beginning of year 1,693 2,178
Transfer to held for sale liabilities (3)  
Per the income statement (225) (495)
additional provisions and changes to existing provisions 64 (495)
reversal of unutilised amounts (289)  
Notional interest 8 9
Utilised during year (cash flow) (543) (43)
Foreign exchange differences recognised in income statement 18 27
Translation of foreign operations 6 17
Balance at end of year R 954 R 1,693