Capital and reserves - Special State Share (Details) - Ordinary shares - shares |
Jul. 14, 2014 |
Feb. 05, 2004 |
Dec. 31, 2025 |
|---|---|---|---|
| Disclosure of classes of share capital [line items] | |||
| Number of special state shares | 1 | ||
| Percentage of shares acquired | 48.60% | ||
| Threshold period for objection, transfer of shares | 30 days | ||
| Minimum [Member] | |||
| Disclosure of classes of share capital [line items] | |||
| Threshold limit for transfer of shares | 24.00% | ||
| Maximum [Member] | |||
| Disclosure of classes of share capital [line items] | |||
| Threshold limit for transfer of shares | 35.00% |