Note 28 Restricted reserves breakdown by concepts (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Restricted reserves breakdown by concepts [Line Items] | |||
| Restricted reserve for retired capital | € 558 | € 531 | € 495 |
| Restricted reserve for parent company shares and loans for those shares | 187 | 49 | 65 |
| Restricted reserve for redenomination of capital in euros | 2 | 2 | 2 |
| Total restricted reserves | € 746 | € 582 | € 561 |