Net Interest Income and Net Gains (Losses) on Financial Assets/Liabilities at Fair Value through Profit or Loss - Net Interest Income (Detail: Text Values) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Net Interest Income and Net Gains (Losses) on Financial Assets/Liabilities at Fair Value through Profit or Loss [Abstract] | |||
| Group borrowing under the TLTRO III-refinancing program | € 0 | € 0 | € 15,000 |
| Net interest expense under TLTRO III program | € 0 | € 144 | € 741 |