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Segment reporting - Additional Information (Details)
€ in Millions
12 Months Ended
Dec. 31, 2021
EUR (€)
segment
Dec. 31, 2020
EUR (€)
Dec. 31, 2019
EUR (€)
Operating Segments [Abstract]      
Number of operating segments | segment 1    
adjustments for share based payments including employer tax € 5.8 € 12.1 € 22.4
Adjustments for acquisition related costs € 12.9 € 7.3 € 3.3