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Share-based payments - Narrative (Details)
€ in Millions
12 Months Ended
Dec. 31, 2024
EUR (€)
ShareBasedCompensationPlan
shares
Dec. 31, 2023
EUR (€)
shares
Dec. 31, 2022
EUR (€)
shares
Share-based payment      
Number of global equity-settled share-based compensation plans | ShareBasedCompensationPlan 3    
Share-based payments | € € 239 € 201 € 148
Metric RTSR 0.50    
Metric cumulative EPS target 0.40    
Metric carbon emissions targets 0.10    
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 66.00% 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 (in shares) 2    
Total number of matching shares issued (in shares) 7,455,343 6,726,190 5,243,560