Credit related Commitments and Contingent Liabilities - Other Commitments and Contingent Liabilities (Detail: Text Values) - EUR (€) € in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Credit related Commitments and Contingent Liabilities [Abstract] | ||
| Other contingent liabilities | € 74 | € 73 |