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Property, Plant and Equipment - Disclosure of Sensitivity Analysis - Impairment of Assets (Details) - ZAR (R)
R in Millions
Jun. 30, 2019
Jun. 30, 2018
Property, plant and equipment [abstract]    
Percentage decrease resulting in additional impairment 10.00% 10.00%
Percentage increase resulting in additional impairment 10.00% 10.00%
Tshepong operations    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease R 7,155 R 5,174
Moab Khotsong    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 2,758 1,636
Kusasalethu    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 1,962 2,716
Doornkop    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 1,350 2,052
Target 1    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 1,278 1,684
Joel    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 984 882
Hidden Valley    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 749 752
Target 3    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 337 141
Impairment 10% increase 300 0
Bambanani    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 331 222
Target North    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 291 1,826
Impairment 10% increase 0 1,090
Other surface operations    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 178 540
Masimong    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 105 386
Impairment 10% increase 0 59
Unisel    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease 45 525
Impairment 10% increase 0 433
Kalgold    
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items]    
Impairment 10% decrease R 39 R 0