v3.26.3
Financial Risk Management - Commodity Price Sensitivity (Details)
R in Millions
 12 Months Ended
Jun. 30, 2026
$ / Tonne
$ / Ounce
Jun. 30, 2026
ZAR (R)
$ / Ounce
$ / t
Jun. 30, 2025
ZAR (R)
$ / Ounce
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Copper Spot Price | $ / Tonne 13,279    
Silver Spot Price | $ / Ounce 58.26    
– 12 months      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Limit of gold production hedged (as a percent)   30.00%  
Between one to two years      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Limit of gold production hedged (as a percent)   20.00%  
Due between two to three years      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Limit of gold production hedged (as a percent)   10.00%  
Not Later Than Two Years      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Limit of silver production hedged (as a percent)   50.00%  
Maximum Copper Production Hedged, Percent   20.00%  
Not Later Than Five Years      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Maximum Uranium Production Hedged, Percent   50.00%  
Cap      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gold Spot Price | $ / Ounce   5,399 3,432
Copper Spot Price | $ / t   14,083  
Silver Spot Price | $ / Ounce   116.58 37.25
Floor      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Gold Spot Price | $ / Ounce   3,275 2,329
Copper Spot Price | $ / t   9,607  
Silver Spot Price | $ / Ounce   36.06 26.60
Cash flow hedges | Commodity price risk | US$ silver contracts      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Reasonably possible increase in risk variable percent   17.00%  
Reasonably possible decrease in risk variable percent   17.00%  
Increase by 11% (2024: 8%), impact on other comprehensive income   R (334) R 0
Decrease by 11% (2024: 8%), impact on other comprehensive income   R 313 R 0
Cash flow hedges | Commodity price risk | Rand Gold Derivative Contracts [Member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Reasonably possible increase in risk variable percent   11.00% 11.00%
Reasonably possible decrease in risk variable percent   11.00% 11.00%
Increase by 11% (2024: 8%), impact on other comprehensive income   R (4,338) R (4,489)
Decrease by 11% (2024: 8%), impact on other comprehensive income   R 4,033 R 3,985
Cash flow hedges | Commodity price risk | US$ gold forward contracts      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Reasonably possible increase in risk variable percent   11.00% 11.00%
Reasonably possible decrease in risk variable percent   11.00% 11.00%
Increase by 11% (2024: 8%), impact on other comprehensive income   R (670) R (735)
Decrease by 11% (2024: 8%), impact on other comprehensive income   R 615 R 651