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Share capital - Authorised, Issued, and Held in Reserve (Details) - R / shares
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Disclosure of classes of share capital        
Shares authorised 1,314,407,571 1,314,407,571 1,175,000,000  
Shares issued 631,028,318 645,560,928 679,822,439 679,775,162
Unissued shares 683,379,253 668,846,643 495,177,561  
Sasol ordinary shares of no par value        
Disclosure of classes of share capital        
Par value per share (in Rand per share) R 0 R 0 R 0  
Shares authorised 1,127,690,590 1,127,690,590 1,127,690,590  
Shares issued 624,696,971 623,081,550 651,436,793  
Unissued shares 502,993,619 504,609,040 476,253,797  
Sasol preferred ordinary shares of no par value        
Disclosure of classes of share capital        
Par value per share (in Rand per share) R 0 R 0 R 0  
Shares authorised 28,385,646 28,385,646 28,385,646  
Shares issued   16,085,199 25,547,081  
Unissued shares 28,385,646 12,300,447 2,838,565  
Sasol BEE ordinary shares of no par value        
Disclosure of classes of share capital        
Par value per share (in Rand per share) R 0 R 0 R 0  
Shares authorised 158,331,335 158,331,335 18,923,764  
Shares issued 6,331,347 6,394,179 2,838,565  
Unissued shares 151,999,988 151,937,156 16,085,199