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Cost of Sales - Disclosure of cost of sales (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Analysis of income and expense [abstract]      
Production costs R 20,324 R 15,084 R 15,042
Amortisation and depreciation of mining assets 3,961 2,468 2,441
Amortisation and depreciation of assets other than mining assets 93 102 78
Rehabilitation expenditure 33 67 23
Care and maintenance costs of restructured shafts 134 128 109
Employment termination and restructuring costs 242 208 74
Share-based payments 155 244 391
Impairment of assets 3,898 5,336 1,718
Other 29 (41) (7)
Total cost of sales R 28,869 R 23,596 R 19,869