v3.26.1
Risk management - Schedule of changes in impairment losses on debt instruments, Spain real estate business (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of credit risk exposure [line items]      
Financial assets at beginning of period € 283,497 € 243,203  
Financial assets at end of period 300,026 283,497 € 243,203
Spain | Real estate operations in Spain | Construction and property development      
Disclosure of credit risk exposure [line items]      
Financial assets at beginning of period 2,545 2,433 2,327
Foreclosed assets 0 0 (1)
Net variation 441 112 115
Written-off assets (2) 0 (8)
Financial assets at end of period € 2,984 € 2,545 € 2,433