Financial assets at fair value through profit or loss - Summary of trading assets (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of fair value measurement of assets [line items] | ||
| Trading assets | € 55,730 | € 72,897 |
| Equity securities | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Trading assets | 21,272 | 20,717 |
| - Debt securities | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Trading assets | 8,120 | 10,080 |
| - Derivatives | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Trading assets | 24,346 | 29,805 |
| Loans and receivables | ||
| Disclosure of fair value measurement of assets [line items] | ||
| Trading assets | € 1,991 | € 12,295 |