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Commitments under leases- finance (Details) - ZAR (R)
R in Millions
Jun. 30, 2018
Jun. 30, 2017
Commitments under leases    
Less amounts representing finance charges R (17,108) R (1,917)
Total minimum future lease payments 7,624 1,864
Within one year    
Commitments under leases    
Finance lease payments 1,171 278
One to five years    
Commitments under leases    
Finance lease payments 3,975 1,195
More than five years    
Commitments under leases    
Finance lease payments R 19,586 R 2,308