Note 36 Transactions on behalf of third parties breakdown by concepts (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Transactions on behalf of third parties [Line Items] | |||
| Financial instruments entrusted by third parties | € 572,336 | € 496,082 | € 430,377 |
| Conditional bills and other securities received for collection | 14,536 | 13,460 | 12,125 |
| Securities lending on behalf of third parties | 6,065 | 5,700 | 6,397 |
| Total transactions on behalf of third parties | € 592,938 | € 515,241 | € 448,899 |