v3.25.4
Fair value of assets and liabilities - Changes in level 3 financial liabilities (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financial liabilities at fair value, class    
Disclosure of fair value measurement of liabilities [line items]    
Unrealised gains on (losses) recognised in the statement of profit or loss € (158) € 206
Level 3    
Disclosure of fair value measurement of liabilities [line items]    
Opening balance as at 1 January 770 729
Realised gain/loss recognised in the statement of profit or loss during the period 157 (206)
Additions 219 274
Redemptions (74) (222)
Maturity/settlement (225) (26)
Transfers into Level 3 38 399
Transfers out of Level 3 (84) (179)
Exchange rate differences (1) 0
Closing balance 802 770
Level 3 | Trading liabilities    
Disclosure of fair value measurement of liabilities [line items]    
Opening balance as at 1 January 637 382
Realised gain/loss recognised in the statement of profit or loss during the period 81 (104)
Additions 205 55
Redemptions (74) (12)
Maturity/settlement (160) (15)
Transfers into Level 3 19 364
Transfers out of Level 3 (72) (33)
Exchange rate differences (1) 0
Closing balance 636 637
Level 3 | Non-trading derivatives    
Disclosure of fair value measurement of liabilities [line items]    
Opening balance as at 1 January 67 301
Realised gain/loss recognised in the statement of profit or loss during the period 82 (98)
Additions 3 190
Redemptions 0 (209)
Maturity/settlement 0 (7)
Transfers into Level 3 0 0
Transfers out of Level 3 0 (111)
Exchange rate differences 0 0
Closing balance 151 67
Level 3 | Financial liabilities designated as at fair value through profit or loss    
Disclosure of fair value measurement of liabilities [line items]    
Opening balance as at 1 January 67 47
Realised gain/loss recognised in the statement of profit or loss during the period (6) (5)
Additions 11 29
Redemptions 0 0
Maturity/settlement (64) (4)
Transfers into Level 3 19 34
Transfers out of Level 3 (12) (34)
Exchange rate differences 0 0
Closing balance € 15 € 67