v3.25.4
Equity - Schedule of changes in revaluation, cash flow, and property reserve (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of equity [Line Items]      
Opening balance € (687) € (2,767)  
Closing balance (3,080) (687) € (2,767)
Reserve of gain loss FVOCI | Equity securities      
Disclosure of equity [Line Items]      
Opening balance 1,816 1,152 1,187
Unrealised revaluations (366) 664 (35)
Realised revaluations transferred to retained earnings (6) 1
Closing balance 1,444 1,816 1,152
Reserve of gain loss FVOCI | - Debt securities      
Disclosure of equity [Line Items]      
Opening balance (479) (280) (341)
Unrealised revaluations 459 (261) 53
Realised gains/losses transferred to the statement of profit or loss (21) 62 9
Closing balance (41) (479) (280)
Cash flow hedge      
Disclosure of equity [Line Items]      
Opening balance (1,693) (2,058) (3,055)
Unrealised revaluations 597 365 997
Closing balance (1,096) (1,693) (2,058)
Credit liability      
Disclosure of equity [Line Items]      
Opening balance (15) 31 70
Changes in credit liability reserve (34) (46) (39)
Closing balance (49) (15) 31
Reserve of property in own use      
Disclosure of equity [Line Items]      
Opening balance 161 178 176
Unrealised revaluations 7 3 10
Realised revaluations transferred to retained earnings (12) (20) (8)
Closing balance € 156 € 161 € 178