v3.26.1
Accounting policies - Held for sale (Details) - ZAR (R)
R in Millions
6 Months Ended 12 Months Ended
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of initial application of standards or interpretations [line items]              
Environmental rehabilitation obligation R 14,000   R 11,805 R 14,000 R 11,805 R 11,355 R 8,435
Property, plant and equipment 64,320   66,906 [1] 64,320 66,906 [1] 61,338  
Proceeds on sale of assets held for sale       318 0 0  
Assets held for sale 30   R 70 [1] 30 70 [1] R 0  
Stellar              
Disclosure of initial application of standards or interpretations [line items]              
Proportion of ownership interest in subsidiary   50.25%          
Neo Energy Metals Plc              
Disclosure of initial application of standards or interpretations [line items]              
Proportion of ownership interest in associate     40.00%        
Assets and liabilities classified as held for sale              
Disclosure of initial application of standards or interpretations [line items]              
Consideration to be received     R 500        
Cash portion of consideration to be received     250        
Environmental rehabilitation obligation 480   451 480 451    
Property, plant and equipment 30   30 R 30 30    
Assets and liabilities classified as held for sale | Stellar              
Disclosure of initial application of standards or interpretations [line items]              
Property, plant and equipment   R 105          
Proceeds on sale of assets held for sale 132            
Other net assets   R 6          
Assets held for sale     40   40    
Assets and liabilities classified as held for sale | Neo Energy Metals Plc              
Disclosure of initial application of standards or interpretations [line items]              
Value of equity consideration     R 250   R 250    
Ioneer Limited              
Disclosure of initial application of standards or interpretations [line items]              
Number of shares in Ioneer Limited (in shares)   145,862,742          
Proportion of ownership   6.19%          
Ioneer Limited | Assets and liabilities classified as held for sale              
Disclosure of initial application of standards or interpretations [line items]              
Fair value of investment   R 164          
Proceeds on sale of assets held for sale R 186            
Fair value of investment derecognized   R 1,134          
[1] Amount for 31 December 2024 was revised (see note 16.2)