v3.26.1
Property, Plant and Equipment -Under construction (Details) - EUR (€)
€ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment € 3,120 € 3,342
Fixed Assets under construction    
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment € 726 € 802