Other operating expenses - Additional information (Details) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Other Operating Expense [Line Items] | |||
| Contributions to the Single and Local Resolution Funds | € 41 | € 35 | € 251 |
| Increase (decrease) in local bank taxes | 41 | ||
| Local bank taxes | 657 | 617 | 472 |
| Belgium, Poland, Germany, Netherlands | |||
| Disclosure Of Other Operating Expense [Line Items] | |||
| Contributions to the Deposit Guarantee Schemes | € 167 | € 230 | € 320 |