v3.26.1
Pension Plans and Other Benefit Plans - Sensitivity analysis of actuarial assumptions used in pension plans calculation (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Rate of interest    
Sensitivity analysis of actuarial assumptions used in pension plans calculation    
Increase in parameter 0.50% 0.50%
Impact on the pension for increase in parameter € (5) € (5)
Decrease in parameter 0.50% 0.50%
Impact on the pension for decrease in parameter € 6 € 6
Pension trend    
Sensitivity analysis of actuarial assumptions used in pension plans calculation    
Increase in parameter 1.00% 1.00%
Impact on the pension for increase in parameter € 6 € 6
Decrease in parameter 1.00% 1.00%
Impact on the pension for decrease in parameter € (5) € (5)
Life expectancy    
Sensitivity analysis of actuarial assumptions used in pension plans calculation    
Impact on the pension for increase in parameter € 3 € 3
Reasonably possible increase in life expectancy measured in period of time 1 year 1 year