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Materials, energy and consumables used - Other commitment (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Purchase commitments      
Purchase commitments R 131,992 R 129,846 R 59,659
ORYX GTL      
Purchase commitments      
Off-take agreements 1,748 1,739  
Oxygen supply agreements for Secunda Operations      
Purchase commitments      
Off-take agreements R 85,013 36,998  
Air Liquide      
Purchase commitments      
Agreement term (in years) 15 years    
Within one year      
Purchase commitments      
Purchase commitments R 27,459 23,121 25,760
One to five years      
Purchase commitments      
Purchase commitments 35,182 32,430 24,030
More than five years      
Purchase commitments      
Purchase commitments R 69,351 R 74,295 R 9,869