Financial assets at fair value through profit or loss - Designated as at fair value through profit or loss (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of fair value measurement of assets [line items] | ||
| Designated at fair value through profit or loss | € 3,448 | € 5,740 |
| Loans and receivables | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Designated at fair value through profit or loss | 1,118 | 1,022 |
| - Debt securities | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Designated at fair value through profit or loss | € 2,330 | € 4,718 |