v3.26.1
Marketable debt securities - Disclosure of maturity analysis of debt instruments, book value (Details) - Marketable debt securities - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Marketable debt securities      
Financial liabilities € 324,390 € 325,521 € 308,579
Debt securities issued      
Marketable debt securities      
Financial liabilities 324,390    
Debt securities issued | Within 3 months      
Marketable debt securities      
Financial liabilities 39,785    
Debt securities issued | 3 to 12 months      
Marketable debt securities      
Financial liabilities 49,809    
Debt securities issued | 1 to 3 years      
Marketable debt securities      
Financial liabilities 97,217    
Debt securities issued | 3 to 5 years      
Marketable debt securities      
Financial liabilities 65,018    
Debt securities issued | More than 5 years      
Marketable debt securities      
Financial liabilities 72,561    
Subordinated debt      
Marketable debt securities      
Financial liabilities 28,859 35,461 30,529
Subordinated debt | Within 3 months      
Marketable debt securities      
Financial liabilities 0    
Subordinated debt | 3 to 12 months      
Marketable debt securities      
Financial liabilities 798    
Subordinated debt | 1 to 3 years      
Marketable debt securities      
Financial liabilities 1,760    
Subordinated debt | 3 to 5 years      
Marketable debt securities      
Financial liabilities 2,277    
Subordinated debt | More than 5 years      
Marketable debt securities      
Financial liabilities 24,024    
Senior unsecured debt      
Marketable debt securities      
Financial liabilities 145,696    
Senior unsecured debt | Within 3 months      
Marketable debt securities      
Financial liabilities 10,509    
Senior unsecured debt | 3 to 12 months      
Marketable debt securities      
Financial liabilities 13,643    
Senior unsecured debt | 1 to 3 years      
Marketable debt securities      
Financial liabilities 51,461    
Senior unsecured debt | 3 to 5 years      
Marketable debt securities      
Financial liabilities 34,465    
Senior unsecured debt | More than 5 years      
Marketable debt securities      
Financial liabilities 35,618    
Senior secured debt      
Marketable debt securities      
Financial liabilities 108,197    
Senior secured debt | Within 3 months      
Marketable debt securities      
Financial liabilities 11,529    
Senior secured debt | 3 to 12 months      
Marketable debt securities      
Financial liabilities 12,308    
Senior secured debt | 1 to 3 years      
Marketable debt securities      
Financial liabilities 43,661    
Senior secured debt | 3 to 5 years      
Marketable debt securities      
Financial liabilities 28,106    
Senior secured debt | More than 5 years      
Marketable debt securities      
Financial liabilities 12,593    
Promissory notes and other securities      
Marketable debt securities      
Financial liabilities 41,638 € 37,295 € 46,170
Promissory notes and other securities | Within 3 months      
Marketable debt securities      
Financial liabilities 17,747    
Promissory notes and other securities | 3 to 12 months      
Marketable debt securities      
Financial liabilities 23,060    
Promissory notes and other securities | 1 to 3 years      
Marketable debt securities      
Financial liabilities 335    
Promissory notes and other securities | 3 to 5 years      
Marketable debt securities      
Financial liabilities 170    
Promissory notes and other securities | More than 5 years      
Marketable debt securities      
Financial liabilities € 326