v3.26.1
Other disclosures - Schedule of financial assets measured at other than fair value (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of fair value measurement of assets [line items]        
Financial assets € 300,026 € 283,497 € 243,203  
Carrying amount        
Disclosure of fair value measurement of assets [line items]        
Financial assets 1,202,689 1,203,707 1,191,403  
Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 1,202,223 1,193,069 1,180,431  
Level 1 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 103,120 87,170 67,951  
Level 2        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 163,796 163,941 133,874  
Level 2 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 127,104 117,731 114,471  
Level 3        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 18,487 15,319 10,351 € 8,290
Level 3 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 971,999 988,168 998,009  
Loans and advances | Carrying amount        
Disclosure of fair value measurement of assets [line items]        
Financial assets 1,062,675 1,082,758 1,087,844  
Loans and advances | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 1,062,981 1,073,530 1,077,543  
Loans and advances | Level 1 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 0 0 0  
Loans and advances | Level 2 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 113,004 104,582 103,414  
Loans and advances | Level 3 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 949,977 968,948 974,129  
Debt securities        
Disclosure of fair value measurement of assets [line items]        
Financial assets 300,026 283,497 243,203  
Debt securities | Carrying amount        
Disclosure of fair value measurement of assets [line items]        
Financial assets 140,014 120,949 103,559  
Debt securities | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 139,242 119,539 102,888  
Debt securities | Level 1 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 103,120 87,170 67,951  
Debt securities | Level 2 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value 14,100 13,149 11,057  
Debt securities | Level 3 | Fair value        
Disclosure of fair value measurement of assets [line items]        
Financial assets, at fair value € 22,022 € 19,220 € 23,880