Equity Investments - Equity Investments Roll-forward (Details) - EUR (€) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of financial assets [line items] | |||
| Fair value adjustment of the year | € (3,600,000) | € 2,500,000 | € 0 |
| Equity instruments | |||
| Disclosure of financial assets [line items] | |||
| Balance as at January 1 | 52,941,000 | ||
| Balance as at December 31 | 46,809,000 | 52,941,000 | |
| Fair value adjustment at January 1 | 2,095,000 | (390,000) | |
| Fair value adjustment of the year | (6,132,000) | 2,485,000 | |
| Fair value adjustment at December 31 | (4,037,000) | 2,095,000 | (390,000) |
| Equity instruments | Gross amount before fair value adjustment. | |||
| Disclosure of financial assets [line items] | |||
| Balance as at January 1 | 50,845,000 | 13,965,000 | |
| Acquisition of the year | 36,880,000 | ||
| Balance as at December 31 | € 50,845,000 | € 50,845,000 | € 13,965,000 |