v3.25.4
Details of treasury and other financial risks - Interest rate risk narrative (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Details of treasury and other financial risks [Line Items]        
Borrowings € 8,084 € 7,639 € 7,689  
Cash and cash equivalents 2,794 2,401 1,869 € 1,172
Long-term debt  6,934 7,113 7,035  
Short-term debt € 1,151 € 526 € 654  
Ratio of fixed-rate long-term debt to total outstanding debt 86.00% 93.00%    
Average remaining term (in years) 5 years 4 months 24 days      
Interest rate swaps | Fair value hedges | Interest rate risk        
Details of treasury and other financial risks [Line Items]        
Nominal amount of hedging instrument (in shares) 250 0    
Interest rate swaps | Fair value hedges | Interest rate risk | Fixed interest rate        
Details of treasury and other financial risks [Line Items]        
Fixed rate received on hedging instrument 0.0325      
Interest rate swaps | Fair value hedges | Interest rate risk | EURIBOR 6M        
Details of treasury and other financial risks [Line Items]        
Average rate of hedging instrument 1.04%