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Remeasurement items affecting operating profit - Summary of Significant Impairment of Assets (Details)
R in Millions, $ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2023
ZAR (R)
Dec. 31, 2022
ZAR (R)
Jun. 30, 2023
ZAR (R)
Jun. 30, 2022
ZAR (R)
Jun. 30, 2021
ZAR (R)
Jun. 30, 2021
CAD ($)
Jun. 30, 2020
ZAR (R)
Impairment              
Impairment loss (reversal of impairment loss)     R 33,649 R (1,443) R 28,732    
Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     32,847        
Right of use assets              
Impairment              
Impairment loss (reversal of impairment loss)     546        
Other intangible assets              
Impairment              
Impairment loss (reversal of impairment loss)     256        
Other (net)              
Impairment              
Impairment loss (reversal of impairment loss)     170 (47) 774    
Other (net) | Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     164        
Other (net) | Other intangible assets              
Impairment              
Impairment loss (reversal of impairment loss)     6        
Fuels | Secunda liquid fuels refinery              
Impairment              
Impairment loss (reversal of impairment loss) R 27,200 R 8,100 35,316   24,456    
Fuels | Secunda liquid fuels refinery | Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     34,634        
Fuels | Secunda liquid fuels refinery | Right of use assets              
Impairment              
Impairment loss (reversal of impairment loss)     436        
Fuels | Secunda liquid fuels refinery | Other intangible assets              
Impairment              
Impairment loss (reversal of impairment loss)     246        
Chemicals America | EO/EG              
Impairment              
Impairment loss (reversal of impairment loss)         (4,934)    
Chemicals America | Tetramerization              
Impairment              
Impairment loss (reversal of impairment loss)     (3,645)        
Chemicals America | Tetramerization | Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     (3,645)        
Chemicals Africa | Chlor Alkali and PVC              
Impairment              
Impairment loss (reversal of impairment loss)         1,094    
Chemicals Africa | South Africa Wax value chain              
Impairment              
Impairment loss (reversal of impairment loss)     932   7,863    
Chemicals Africa | South Africa Wax value chain | Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     928        
Chemicals Africa | South Africa Wax value chain | Other intangible assets              
Impairment              
Impairment loss (reversal of impairment loss)     4        
Chemicals Africa | Chemical Work Up & Heavy Alcohols value chain              
Impairment              
Impairment loss (reversal of impairment loss)       R (1,396)     R 1,700
Chemicals Eurasia | China Essential Care Chemicals (ECC)              
Impairment              
Impairment loss (reversal of impairment loss)     876        
Chemicals Eurasia | China Essential Care Chemicals (ECC) | Property, plant and equipment.              
Impairment              
Impairment loss (reversal of impairment loss)     766        
Chemicals Eurasia | China Essential Care Chemicals (ECC) | Right of use assets              
Impairment              
Impairment loss (reversal of impairment loss)     R 110        
Gas | Canadian shale gas assets              
Impairment              
Impairment loss (reversal of impairment loss)         R (521) $ (45)