| Other components of equity  | 
||||||||||
| Note | Share  capital Rm  | 
Equity-  settled Rm  | 
Retained  earnings/ (accumulated deficit) Rm  | 
Total  equity Rm  | 
||||||
| At 31 December 2022 | 11 227 | 743 | (40) | 11 930 | ||||||
| Total comprehensive income | 7 998 | 7 998 | ||||||||
| – Profit for the year | 7 998 | 7 998 | ||||||||
| Transactions with owners | (484) | (7 961) | (8 445) | |||||||
| Contributions and distributions | (484) | (7 961) | (8 445) | |||||||
| – Share-based payments movement | (484) | (484) | ||||||||
| – Dividends paid | 5.6 | (7 961) | (7 961) | |||||||
| At 31 December 2023 | 11 227 | 259 | (3) | 11 483 | ||||||
| Total comprehensive income | 8 849 | 8 849 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| – Profit for the year | 8 849 | 8 849 | ||||||||
| Transactions with owners | (145) | (8 306) | (8 451) | |||||||
| Contributions and distributions | (145) | (8 306) | (8 451) | |||||||
| – Share-based payments movement | (145) | (145) | ||||||||
| – Dividends paid | 5.6 | (8 306) | (8 306) | |||||||
| At 31 December 2024 | 11 227 | 114 | 540 | 11 881 |