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Share-based payments - Narrative (Details)
€ in Millions
12 Months Ended
Dec. 31, 2023
EUR (€)
ShareBasedCompensationPlan
shares
Dec. 31, 2022
EUR (€)
shares
Dec. 31, 2021
EUR (€)
shares
Share-based payment      
Share-based payments | € € 202 € 149 € 118
Number of global equity-settled share-based compensation plans | ShareBasedCompensationPlan 3    
Performance share grant      
Share-based payment      
Weighted average remaining contractual life of outstanding share options 3 years    
Portion of grants applying ATSR performance metric 66.00%    
Portion of grants applying either service condition or relative TSR grants measure 33.00%    
Performance share grant | Minimum      
Share-based payment      
Percentage payout compared to peer group 25.00%    
Employee Share Purchase Plan      
Share-based payment      
Saving period 12 months    
Number of matching shares per every two shares 1    
The number of shares that will be matched with one share 2    
Total number of matching shares issued (in shares) 6,726,190 5,243,560 4,851,070