Earnings per Share (Parenthetical) - EUR (€) € in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Earnings per Common Share [Abstract] | |||||
| Earnings adjustment for coupons paid on Additional Tier 1 Notes before tax | € 32 | € 728 | € 761 | € 574 | € 498 |