Additional disclosure requirements - Schedule of preference shares and preferred securities (Details) - Financial liabilities at amortized cost - EUR (€) € in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Subordinated | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Outstanding issue amount | € 9,294 | € 10,032 |
| Preference shares | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Outstanding issue amount | 205 | 211 |
| Preferred securities | ||
| Disclosure of detailed information about financial instruments [line items] | ||
| Outstanding issue amount | € 9,089 | € 9,821 |