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Deferred tax - Temporary differences (Details) - ZAR (R)
R in Millions
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets R (24,511) R (31,665) R (8,563)
Deferred tax liabilities 7,793 19,154 R 26,541
Property, plant and equipment      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets 6,287 (5,285)  
Deferred tax liabilities 13,392 25,423  
Right of use assets      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets 1,024 1,103  
Deferred tax liabilities 1,370 1,150  
Current assets      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax liabilities (1,124) (894)  
Short- and long-term provisions      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets (3,731) (4,065)  
Deferred tax liabilities (3,948) (3,371)  
Calculated tax losses      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets (24,097) (18,768)  
Deferred tax liabilities (11) (448)  
Financial liabilities      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets (1,324) (2,238)  
Deferred tax liabilities 135 (517)  
Other temporary differences      
Disclosure of temporary difference, unused tax losses and unused tax credits      
Deferred tax assets (2,670) (2,412)  
Deferred tax liabilities R (2,021) R (2,189)