v3.25.4
Note 41 Derivatives hedge accounting (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting € (695) € 181 € (812)
Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (694) 176 (795)
Hedging derivatives ineffectiveness [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (1) 5 (17)
Interest rate agreements hedge accounting [Member] | Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (505) (21) 427
Securities agreements hedge accounting [Member] | Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (1,001) 236 (402)
Credit derivative agreements hedge accounting [Member] | Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (44) (123) (56)
Foreign exchange agreements hedge accounting [Member] | Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting 775 (15) (431)
Other agreements hedge accounting [Member] | Trading derivatives hedge accounting [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting 81 99 (332)
Fair value hedges ineffectivenes [Member] | Hedging derivatives ineffectiveness [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting 0 8 (10)
Hedging derivative fair value ineffectiveness [Member] | Hedging derivatives ineffectiveness [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting 329 (512) (114)
Hedged item fair value ineffectiveness [Member] | Hedging derivatives ineffectiveness [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting (328) 520 103
Cash flow hedges ineffectiveness [Member] | Hedging derivatives ineffectiveness [Member]      
Derivatives hedge accounting [Line Items]      
Derivatives- hedge accounting € (2) € (3) € (7)