v3.26.1
Impairments and reversal of impairments - Impairment assumptions (Details)
R in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
ZAR (R)
$ / t
$ / oz
Jun. 30, 2024
ZAR (R)
$ / oz
Dec. 31, 2025
ZAR (R)
R / kg
$ / t
Dec. 31, 2024
ZAR (R)
$ / oz
Dec. 31, 2023
ZAR (R)
$ / lb
$ / t
R / kg
$ / oz
US PGM operations          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Average PGM (2E) basket price (in USD per ounce) | $ / oz 1,118 1,206   1,120 1,281
Inflation rate 2.10% 2.50%   2.10% 2.50%
Nominal discount rate 10.56% 11.50%   13.00% 12.00%
Life-of-mine 67 years        
Recoverable amount R 9,361 R 15,224   R 13,682 R 22,246
US PGM operations | Mining assets          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Life-of-mine   45 years 6 months   35 years 46 years
Keliber          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Average lithium hydroxide price (in USD per tonne) | $ / t 17,972   17,475    
Inflation rate 2.00%   2.00%    
Nominal discount rate 11.19%   10.14%    
Life-of-mine 20 years   20 years    
Recoverable amount R 9,359   R 8,925    
Kloof          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average gold price | R / kg     2,295,754    
Inflation rate     3.50%    
Nominal discount rate     11.68%    
Life-of-mine     1 year    
Beatrix          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average gold price | R / kg     1,983,927    
Inflation rate     3.50%    
Nominal discount rate     12.76%    
Life-of-mine     6 years    
Recoverable amount     R 9,341    
Driefontein          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average gold price | R / kg     1,856,994    
Inflation rate     3.50%    
Nominal discount rate     13.52%    
Life-of-mine     11 years    
Recoverable amount     R 20,581    
Burnstone          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average gold price | R / kg     1,670,512   1,012,625
Inflation rate     3.50%   6.00%
Nominal discount rate     15.22%   18.90%
Life-of-mine     23 years    
Recoverable amount     R 13,039   R 3,799
Burnstone | Mining assets          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Life-of-mine         25 years
Sandouville nickel refinery          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average nickel price | $ / lb         8.9
Weighted average cobalt price | $ / lb         15.8
Inflation rate         1.60%
Nominal discount rate         7.40%
Recoverable amount         R 0
Sandouville nickel refinery | Mining assets          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Life-of-mine         23 years
Century zinc retreatment operation          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Weighted average zinc price | $ / t         3,873
Inflation rate         2.90%
Nominal discount rate         9.30%
Recoverable amount         R 0
Century zinc retreatment operation | Mining assets          
Disclosure of impairment loss and reversal of impairment loss [line items]          
Life-of-mine         4 years