Details of treasury and other financial risks - Net debt and interest rate sensitivity (Detail) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Interest rate risk | ||
| Details of treasury and other financial risks [Line Items] | ||
| Impact 1% interest increase on the annualized net interest expense | € 27 | € 23 |