Financial liabilities at fair value through profit or loss - Summary of designated as at fair value through profit or loss by type (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of fair value measurement of liabilities [line items] | ||
| Designated at fair value through profit or loss | € 55,768 | € 49,543 |
| Funds entrusted | ||
| Disclosure of fair value measurement of liabilities [line items] | ||
| Designated at fair value through profit or loss | 46,930 | 39,577 |
| Subordinated liabilities | ||
| Disclosure of fair value measurement of liabilities [line items] | ||
| Designated at fair value through profit or loss | 131 | 122 |
| - Debt securities | ||
| Disclosure of fair value measurement of liabilities [line items] | ||
| Designated at fair value through profit or loss | € 8,707 | € 9,844 |