Financial Assets and Liabilities - Movements in Level 3 Fair Value Measurements (Detail) - EUR (€) € in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||
| Beginning balance | € 150,670 | |
| Ending balance | 233,761 | |
| Level 3 [member] | ||
| Reconciliation of changes in fair value measurement, liabilities [abstract] | ||
| Beginning balance | 150,670 | € 143,296 |
| Remeasurement recognized in finance (income) or expense | 83,091 | 25,050 |
| Ending balance | € 233,761 | € 168,346 |