Employee benefits - Additional information (Details) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Employee benefits | |||
| Net balance of post-employee benefits | € 11,642 | € 17,240 | € 17,972 |
| Description of decrease in actuarial assumption leading to changes in defined benefit obligation | A 100-basis-point decrease in the discount rate would result in a €1.30 million increase in the amount of the defined-benefit obligation as of December 31, 2025 (December 31, 2024: €1.01 million). | ||
| Actuarial assumption of discount rates | |||
| Employee benefits | |||
| Percentage of reasonably possible decrease in actuarial assumption | 1.00% | ||
| Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption | € 1,300 | 1,010 | |
| Post-employee benefits defined-benefits plans | |||
| Employee benefits | |||
| Net balance of post-employee benefits | € 10,006 | € 12,838 |