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Property, plant and equipment Disclosure NBV of Right of Use Assets (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Asset Class of RIght of use Assets [Line Items]    
Right-of-use assets € 60.2 € 49.0
Additions to right-of-use assets 8.1  
Acquisitions through business combinations, 19.0  
Land and buildings [member]    
Asset Class of RIght of use Assets [Line Items]    
Right-of-use assets 44.8 38.5
Property, plant and equipment [member]    
Asset Class of RIght of use Assets [Line Items]    
Right-of-use assets 15.3 10.3
Computer equipment [member]    
Asset Class of RIght of use Assets [Line Items]    
Right-of-use assets € 0.1 € 0.2