Derivatives and hedge accounting - Gross carrying value of derivatives designated under fair value hedge accounting (Details) - - Derivatives - - fair value hedges - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Interest rate risk | – Interest rate swaps | ||
| Disclosure of detailed information about hedging instruments [line items] | ||
| Hedging instrument, assets | € 2,831 | € 3,080 |
| Hedging instrument, liabilities | 4,294 | 5,673 |
| Interest rate risk | – Other interest derivatives | ||
| Disclosure of detailed information about hedging instruments [line items] | ||
| Hedging instrument, assets | 213 | 207 |
| Hedging instrument, liabilities | 13 | 23 |
| Foreign exchange | – Cross currency swaps | ||
| Disclosure of detailed information about hedging instruments [line items] | ||
| Hedging instrument, assets | 12 | |
| Hedging instrument, liabilities | € 3 |