v3.25.4
Post-employment benefits - Plan assets (Detail) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Plan assets    
Post-employment benefits [Line Items]    
Net defined benefit liability (asset) at beginning of the period € 1,150 € 1,089
Interest income on plan assets 35 45
Admin expenses paid (1) (1)
Return on plan assets excluding interest income (34) 13
Employee contributions 4 4
Employer contributions (5) 30
Settlements (340) 0
Benefits paid from plan (103) (63)
Translation differences and other (44) 33
Net defined benefit liability (asset) at end of period 662 1,150
Asset ceiling    
Post-employment benefits [Line Items]    
Net defined benefit liability (asset) at beginning of the period (1) 0
Interest income on plan assets 0 0
Admin expenses paid 0 0
Return on plan assets excluding interest income 0 0
Employee contributions 0 0
Employer contributions 0 0
Settlements 0 0
Benefits paid from plan 0 0
Translation differences and other 0 (1)
Net defined benefit liability (asset) at end of period € (1) € (1)