v3.26.1
Property, plant and equipment - Schedule of Property, Plant and Equipment (Detail) (Parenthetical) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment € 7,149 € 4,272
Right-of-use assets 646 € 50
Space Segment Satellites [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment 1,571  
Right-of-use assets € 438