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Revenue - Remaining Performance Obligations (Details) - EUR (€)
€ in Billions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Disclosure of performance obligations    
Unsatisfied performance obligations € 58.0 € 46.9
Percentage allocated to remaining performance obligations 50.00%  
Explanation of when entity expects to recognise transaction price allocated to remaining performance obligations as revenue over the next 12 months  
Performance obligations    
Disclosure of performance obligations    
Unsatisfied performance obligations € 44.3 € 32.4