v3.26.3
Financial Risk Management - Credit Risk (Details) - ZAR (R)
R in Millions
Jun. 30, 2026
Jun. 30, 2025
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk R 22,200 R 23,100
Restricted investments 7,320 6,731
Restricted Investments Collective investment scheme combined (unit trust)    
Disclosure of detailed information about financial instruments [line items]    
Restricted investments 97 84
Equity investments    
Disclosure of detailed information about financial instruments [line items]    
Restricted investments 449 384
Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 8,624 13,101
Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 7,164 6,593
Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 2,391 568
AA Plus | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 3,341 8,558
AA Plus | Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 7,109 6,542
AA Plus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 601 239
A Plus | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 434 0
A Plus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 0 172
AA | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 6 0
AA | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 1,032 66
AA Minus | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 4,843 4,543
AA Minus | Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 55 51
AA Minus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk R 758 R 91