v3.25.4
Pension and other post-employment benefits - Schedule of changes in fair value of plan assets (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value of plan assets [line items]      
Interest income € (19) € (16) € (21)
Plan assets      
Disclosure of fair value of plan assets [line items]      
Opening balance 2,636 2,678  
Interest income 108 106  
Remeasurements: Return on plan assets excluding amounts included in interest income (37) (118)  
Employer's contribution 13 23  
Participants contributions 4 4  
Benefits paid (121) (128)  
Effect of curtailment or settlement (12) (8)  
Exchange rate differences (93) 79  
Closing balance 2,497 2,636 € 2,678
Actual return on the plan assets € 70 € (12)