Net interest income - Additional information (Details) - EUR (€) € in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| EU IAS 39 carve-out | ||
| Net Interest Income Disclosure [Line Items] | ||
| Increase (decrease) of net interest income | € 131 | € 107 |
| Without EU IAS 39 carve-out | ||
| Net Interest Income Disclosure [Line Items] | ||
| Increase (decrease) of net interest income | € (496) | |