v3.25.3
Commitments and Contingencies - Disclosure of Contingent liabilities (Details)
R in Millions, $ in Millions
Dec. 01, 2008
ZAR (R)
shares
Jun. 30, 2025
ZAR (R)
Dec. 01, 2008
USD ($)
Disclosure of commitments and contingencies [line items]      
Additional cash payable when decision to mine is made | $     $ 7
Wafi-Golpu Joint Operation      
Disclosure of commitments and contingencies [line items]      
Additional cash payable when decision to mine is made | $     3
Rio Tinto      
Disclosure of commitments and contingencies [line items]      
Shares issued for purchase of rights to the royalty agreement (in shares) | shares 3,364,675    
Value of shares on transaction date R 242    
Additional cash payable when decision to mine is made | $     $ 10
Liability for environmental disturbances and degradation caused before the effective date (in excess of)      
Disclosure of commitments and contingencies [line items]      
Financial exposure   R 75  
Liability for environmental disturbances and degradation caused before the effective date (in excess of) | Rand Uranium      
Disclosure of commitments and contingencies [line items]      
Financial exposure   75  
Contingent Liability for rates payable | Merafong Municipality | Floor      
Disclosure of commitments and contingencies [line items]      
Financial exposure   124  
Contingent Liability for rates payable | Merafong Municipality | Cap      
Disclosure of commitments and contingencies [line items]      
Financial exposure   164  
Contingent liability payable for rates, Harmony | Merafong Municipality | Floor      
Disclosure of commitments and contingencies [line items]      
Financial exposure   17  
Contingent liability payable for rates, Harmony | Merafong Municipality | Cap      
Disclosure of commitments and contingencies [line items]      
Financial exposure   R 69