Note 22 Liabilities under insurance and reinsurance contracts (Details) - EUR (€) € in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Liabilities under insurance and reinsurance contracts [Line Items] | ||
| Liabilities Covered by Insurance and Reinsurance contracts | € 13,782 | € 12,760 |
| Liabilities for remaining coverage [Member] | ||
| Liabilities under insurance and reinsurance contracts [Line Items] | ||
| Liabilities Covered by Insurance and Reinsurance contracts | 12,338 | 11,456 |
| Liabilities for incurred claims [member] | ||
| Liabilities under insurance and reinsurance contracts [Line Items] | ||
| Liabilities Covered by Insurance and Reinsurance contracts | € 1,444 | € 1,304 |