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Income and Expenses - Cost of Sales (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Income And Expenses [Line Items]      
Costs of sales € 59,333 € 17,361 € 13,690
Commercial      
Disclosure Of Income And Expenses [Line Items]      
Costs of sales 59,333 17,361 13,690
Commercial | COVID-19 Vaccine Revenues      
Disclosure Of Income And Expenses [Line Items]      
Costs of sales 35,616    
Commercial | Other Sales      
Disclosure Of Income And Expenses [Line Items]      
Costs of sales € 23,717 € 17,361 € 13,690