Allowance for credit losses (Detail: Text Values) - EUR (€) € in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Allowance for Credit Losses [Abstract] | ||
| Reimbursement gain included in provision for credit losses excluding country risk | € 9 | € 8 |
| Allowance for country risk not included in allowance for credit losses for financial assets at amortized cost | 7 | 7 |
| Allowance for country risk not included in allowance for credit losses for off-balance sheet positions | € 13 | € 10 |