v3.25.4
Property and Equipment (Detail: Text Values) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Carrying value of items of property and equipment on which there is a restriction on sale € 1 € 1
Contractual commitments for acquisition of property, plant and equipment 1 24
Additions to right-of-use assets 102  
Depreciation charges for right-of-use assets 511  
Right-of-use assets 3,700 3,900
Properties    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Right-of-use assets 3,700 3,900
Vehicles    
Disclosure of reconciliation of changes in property, plant and equipment, including right-of-use assets [line items]    
Right-of-use assets € 19 € 19