v3.25.4
Property and equipment - Schedule of property and equipment (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets € 2,478 € 2,434 € 2,399
Right-of-use assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 972 1,033 1,078
Property | Property in own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 863 758 616
Property | Right-of-use assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 837 895  
Equipment | Property in own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 644 643 € 705
- Data processing equipment | Property in own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 197 218  
- Other equipment | Property in own use      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 447 426  
- ROU cars | Right-of-use assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets 123 124  
- ROU other leases | Right-of-use assets      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment including right-of-use assets € 12 € 13