Cash and balances with central bank - Summary of cash and balances with central banks (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Cash and balances with central bank [Line Items] | |||
| Amounts held at central banks | € 51,133 | € 68,708 | |
| Cash and bank balances | 1,756 | 1,645 | |
| Cash and bank balances at central banks | 52,889 | 70,353 | € 90,214 |
| Accumulated impairments | |||
| Cash and balances with central bank [Line Items] | |||
| Amounts held at central banks | € (17) | € (14) |