v3.26.1
Equity - Treasury Stock - Tabular Disclosure - Value (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Equity    
Balance at beginning of the year [1] € 8,606 € 7,513
Balance at end of the year 7,603 8,606 [1]
Treasury stock    
Equity    
Balance at beginning of the year [1] (135) (153)
Balance at end of the year (131) (135) [1]
Treasury stock | Class A, Ordinary shares    
Equity    
Balance at beginning of the year (90)  
Disposal of shares (4)  
Balance at end of the year (86) (90)
Treasury stock | Class B, Preference shares    
Equity    
Balance at beginning of the year (45) (63)
Disposal of shares   (18)
Balance at end of the year € (45) € (45)
[1] (See Note 2.d)