Valuation results and net trading income - Additional information (Details) - EUR (€) € in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Trading securities | ||
| Valuation Results And Net Trading Income [Line Items] | ||
| Impact of interest rate volatility, EU IAS39 carve out adjustment | € 933 | € 1,405 |