Capital and funding - Narrative (Details) - shares |
1 Months Ended | 11 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 08, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of classes of share capital [line items] | |||||
| Number of shares acquired (in shares) | 27,815,955 | 27,368,909 | |||
| Number of treasury shares cancelled (in shares) | 13,288,138 | ||||
| Number of ordinary shares held by employee share ownership trust (in shares) | 1,208,143 | 1,208,143 | 1,776,250 | ||
| Number of treasury shares cancelled after share consolidation (in shares) | 51,625,153 | ||||
| Number of ordinary shares held by other group companies in connection with share-based compensation plans (in shares) | 314,912 | 314,912 | 290,198 | ||
| Ordinary shares | |||||
| Disclosure of classes of share capital [line items] | |||||
| Number of treasury shares cancelled (in shares) | 64,913,291 | 112,746,434 | |||
| Number of treasury shares cancelled after share consolidation (in shares) | 51,625,153 | 13,288,138 | |||