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Cash-settled share-based payment provision - Per statement of financial position and Total intrinsic value of rights vested, but not yet exercised (Details) - ZAR (R)
R in Millions
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based payment transaction      
Per statement of financial position R 19,960 R 17,727 R 18,779
Share-based payments      
Share-based payment transaction      
Per statement of financial position 264 1,101 R 885
Share Appreciation Right (SARs)      
Share-based payment transaction      
Total intrinsic value of rights vested, but not yet exercised 52 1,085  
Share Appreciation Right (SARs) | Share-based payments      
Share-based payment transaction      
Per statement of financial position 264 1,101  
SARs with no CPTs      
Share-based payment transaction      
Total intrinsic value of rights vested, but not yet exercised 2 98  
SARs with no CPTs | Share-based payments      
Share-based payment transaction      
Per statement of financial position 2 98  
SARs with CPTs      
Share-based payment transaction      
Total intrinsic value of rights vested, but not yet exercised 50 987  
SARs with CPTs | Share-based payments      
Share-based payment transaction      
Per statement of financial position R 262 R 1,003