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Deferred tax - Dividend withholding tax (Details) - ZAR (R)
R in Millions
 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Deferred tax    
Dividend withholding tax rate 20.00%  
Undistributed earnings at end of year that would be subject to dividend withholding tax withheld by the company on behalf of Sasol Limited shareholders R 185,064 R 175,132
Maximum withholding tax payable by shareholders if distributed to individuals R 37,013 R 35,026