v3.25.4
Net Gains (Losses) from Derecognition of Financial Assets Measured at Amortized Cost (Detail) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Gain and Losses on derecognition of Financial Assets at Amortized Cost [Abstract]      
Gains € 21 € 10 € 5
Losses (12) (21) (101)
Net gains (losses) from derecognition of financial assets measured at amortized cost € 9 € (11) € (96)