v3.25.3
Financial Risk Management - Foreign Exchange Risk (Details)
R in Millions
12 Months Ended
Jun. 30, 2025
ZAR (R)
Jun. 30, 2025
ZAR (R)
Jun. 30, 2025
ZAR (R)
Jun. 30, 2025
ZAR (R)
ZAR_per_AUD
Jun. 30, 2025
ZAR (R)
southAfricanRandPerUSDollar
Jun. 30, 2025
ZAR (R)
australianDollarPerPapuaNewGuineanKina
Jun. 30, 2024
ZAR (R)
Jun. 30, 2024
ZAR (R)
Jun. 30, 2024
ZAR (R)
ZAR_per_AUD
Jun. 30, 2024
ZAR (R)
southAfricanRandPerUSDollar
Jun. 30, 2024
ZAR (R)
australianDollarPerPapuaNewGuineanKina
Jun. 30, 2023
ZAR (R)
R / $
Jun. 30, 2025
R / $
Jun. 30, 2025
ZAR_per_AUD
Jun. 30, 2025
papuaNewGuineanKinaPerAustralianDollar
Jun. 30, 2025
southAfricanRandPerUSDollar
Jun. 30, 2025
USD_per_AUD
Jun. 30, 2024
R / $
Jun. 30, 2024
ZAR_per_AUD
Jun. 30, 2024
papuaNewGuineanKinaPerAustralianDollar
Jun. 30, 2024
USD_per_AUD
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Foreign exchange rate risk hedged limit (as a percent)     25.00%                                    
Foreign exchange risk exposure term 24 months                                        
Closing rate                       18.83 17.75 11.68 2.72 17.75   18.19 12.14 2.57  
Foreign exchange translation gain/(loss)   R (819)         R (943)         R 1,123                  
Remeasurement of gold hedging contracts   (4,842)         (499)         R (1,233)                  
Floor                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Closing daily foreign exchange rate       11.29 17.10 2.42     11.71 17.54 2.30                    
Cap                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Closing daily foreign exchange rate       12.41 19.75 2.75     12.72 19.51 2.60                    
Current derivative financial instruments | Not designated as hedging instrument | Financial assets at fair value through profit or loss, category [member]                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Financial assets R 264 264 R 264 R 264 R 264 R 264 425 R 425 R 425 R 425 R 425                    
Currency risk | US$ against AU$ | Financial assets                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Risk exposure 2,796 2,796 R 2,796 2,796 2,796 2,796 252 R 252 252 252 252                    
Increase by 4% (2024: 3%), impact on earnings   112         7                            
Decrease by 4% (2024: 3%), impact on earnings   (112)         (8)                            
Closing rate | USD_per_AUD                                 0.66       0.67
Currency risk | Financial assets | US$ against AU$                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Reasonably possible increase in risk variable percent     4.00%         3.00%                          
Reasonably possible decrease in risk variable percent     4.00%         3.00%                          
Currency risk | Derivative financial instruments | Rand against US$                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Risk exposure 288 288 R 288 288 288 288 523 R 523 523 523 523                    
Reasonably possible increase in risk variable percent     4.00%         3.00%                          
Increase by 4% (2024: 3%), impact on earnings   162         250                            
Reasonably possible decrease in risk variable percent     4.00%         3.00%                          
Decrease by 4% (2024: 3%), impact on earnings   (143)         (241)                            
Closing rate | R / $                         17.75         18.19      
Currency risk | Borrowings | Rand against US$                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Risk exposure 1,777 1,777 R 1,777 1,777 1,777 1,777 1,794 R 1,794 1,794 1,794 1,794                    
Reasonably possible increase in risk variable percent     4.00%         3.00%                          
Increase by 4% (2024: 3%), impact on earnings   71         54                            
Reasonably possible decrease in risk variable percent     4.00%         3.00%                          
Decrease by 4% (2024: 3%), impact on earnings   (71)         (54)                            
Closing rate | R / $                         17.75         18.19      
Currency risk | Contingent Consideration Liability (Eva) | US$ against AU$                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Risk exposure 781 781 R 781 781 781 781 378 R 378 378 378 378                    
Reasonably possible increase in risk variable percent     4.00%         3.00%                          
Increase by 4% (2024: 3%), impact on earnings   31         11                            
Reasonably possible decrease in risk variable percent     4.00%         3.00%                          
Decrease by 4% (2024: 3%), impact on earnings   (31)         (11)                            
Closing rate | R / $                         0.66         0.67      
Currency risk | Contingent Consideration Liability (Mponeng) | Rand against US$                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Risk exposure R 676 676 R 676 R 676 R 676 R 676 587 R 587 R 587 R 587 R 587                    
Reasonably possible increase in risk variable percent     4.00%         3.00%                          
Increase by 4% (2024: 3%), impact on earnings   27         18                            
Reasonably possible decrease in risk variable percent     4.00%         3.00%                          
Decrease by 4% (2024: 3%), impact on earnings   R (27)         R (18)                            
Closing rate | R / $                         17.75         18.19      
Currency risk | Contingent consideration liability | Rand Against AUD                                          
Disclosure of nature and extent of risks arising from financial instruments [line items]                                          
Reasonably possible increase in risk variable percent     3.00%         3.00%