v3.26.3
Streaming Arrangement - Disclosure of reconciliation of the streaming contract liability (Details)
R in Millions, $ in Millions
 12 Months Ended
Jun. 18, 2028
t
Jun. 17, 2028
t
Jun. 16, 2028
USD ($)
Jun. 30, 2026
ZAR (R)
t
oz
Jun. 30, 2025
ZAR (R)
Jun. 30, 2024
ZAR (R)
Jun. 30, 2026
USD ($)
t
oz
Oct. 24, 2025
ZAR (R)
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       R 5,736 R 0      
Current portion of streaming contract liability       455 0 R 85    
Non-current portion of streaming contract liability       5,281 0 0    
Copper OR Royalties [Abstract]                
Consideration from streaming contract       R 0 86 323    
OR Royalties Inc.                
Copper OR Royalties [Abstract]                
Copper tonnes delivered | t       2,100     2,100  
Copper tonnes delivered | t   33,000            
Silver OR Royalties [Abstract]                
Silver ounces delivered | oz       1,276,429     1,276,429  
Copper Host Contract Financial Liabilities | OR Royalties Inc.                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities               R 2,300
Copper Compound Derivative | OR Royalties Inc.                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities               209
Silver Host Contract Financial Liabilities | OR Royalties Inc.                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities               2,900
Silver derivative | OR Royalties Inc.                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities               R 0
Copper stream                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       R 2,403 0      
Copper OR Royalties [Abstract]                
Outstanding Copper Deposit       865     $ 53  
Copper stream | OR Royalties Inc.                
Copper OR Royalties [Abstract]                
First Stream - Copper Stream Percentage     3.00%          
Second Stream - Copper Stream Percentage   4.875%            
Tail Stream - Copper Stream Percentage 2.25%              
Consideration from streaming contract | $     $ 40          
Consideration from streaming contract - Buydown Option 2 | $     $ 20          
Percent of Second-threshold stream   3.25%            
Percent of Tail stream - Buy-down option 1 1.50%              
Threshold quantity - Buydown option 1 | t 23,900              
Percent of Second-threshold stream - Buy-down option 2   4.0625%            
Percent of Tail stream - Buy-down option 2 1.875%              
Threshold quantity - Buydown option 2 | t 28,450              
Copper stream | Copper Host Contract Financial Liabilities                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       2,256 0 0    
Current portion of streaming contract liability       134 0      
Non-current portion of streaming contract liability       2,122 0      
Copper stream | Copper Compound Derivative                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       147 0 0    
Current portion of streaming contract liability       32 0      
Non-current portion of streaming contract liability       115 0      
Silver stream                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       3,332 0      
Silver OR Royalties [Abstract]                
Outstanding Silver Deposit       459     $ 28  
Silver stream | Silver Host Contract Financial Liabilities                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       2,807 0 0    
Current portion of streaming contract liability       244 0      
Non-current portion of streaming contract liability       2,563 0      
Silver stream | Silver derivative                
Disclosure of streaming arrangement [Line Items]                
Contract liabilities       525 0 R 0    
Current portion of streaming contract liability       44 0      
Non-current portion of streaming contract liability       R 481 R 0