v3.25.3
Financial Risk Management - Credit Risk (Details) - ZAR (R)
R in Millions
Jun. 30, 2025
Jun. 30, 2024
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk R 23,125 R 13,566
Restricted investments 6,731 6,044
Restricted Investments Collective investment scheme combined (unit trust)    
Disclosure of detailed information about financial instruments [line items]    
Restricted investments 84 75
Equity investments    
Disclosure of detailed information about financial instruments [line items]    
Restricted investments 384 335
Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 13,101 4,693
Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 6,593 6,123
Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 568 1,011
AA Plus | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 8,558 3,598
AA Plus | Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 6,542 5,677
AA Plus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 239 407
A Plus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 172 227
AAA | Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 0 401
AA | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 66 221
AA Minus | Cash and cash equivalents    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 4,543 1,095
AA Minus | Restricted Cash and Investments    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk 51 45
AA Minus | Derivative financial assets    
Disclosure of detailed information about financial instruments [line items]    
Maximum exposure to credit risk R 91 R 156