Accumulated retained earnings - Narrative (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Retained earnings [abstract] | |
| Percentage of annual net profit required to be transferred to the legal reserve | 10.00% |
| Percentage of share capital required to be maintained in the legal reserve before annual transfers can be discontinued | 20.00% |
| Minimum percentage of increased share capital required to be maintained in the legal reserve if reserves are used to increase capital | 10.00% |