Financial Assets and Liabilities - Movements in Level 3 Fair Value Measurements (Detail) - EUR (€) € in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||
| Beginning balance | € 256,231 | |
| Ending balance | 290,482 | |
| Level 3 [member] | ||
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||
| Beginning balance | 256,231 | € 150,670 |
| Remeasurement recognized in finance (income) or expense | 34,251 | 23,911 |
| Ending balance | € 290,482 | € 174,581 |