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Financial Assets and Financial Liabilities - Additional Information (Details)
12 Months Ended
Dec. 21, 2020
EUR (€)
Dec. 31, 2020
EUR (€)
Loan
Jun. 30, 2020
EUR (€)
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Fair value adjustment derived from remeasuring embedded derivative   € 17,300,000  
June 2020 Private Placement | Convertible Note      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Investment in convertible note   € 100,000,000  
Maturity period   4 years  
Convertible note coupon rate   4.50%  
Conversion premium of convertible note   20.00%  
Effective interest rate   9.00%  
Deutsche Bank AG      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Number of secured bank loan | Loan   2  
2.15% Secured Loan | Deutsche Bank AG | BioNTech Innovative Manufacturing Services GmbH      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Secured bank loan   € 10,000,000  
Interest rate   2.15%  
Maturity Date   Dec. 30, 2027  
Loan repayable quarterly Installment   € 300,000  
Loan repayable quarterly installment commencing date   Jun. 30, 2020  
2.08% Bank Loan | Deutsche Bank AG | JPT Peptide Technologies GmbH      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Secured bank loan   € 9,450,000  
Interest rate   2.08%  
Maturity Date   Sep. 30, 2028  
Loan repayable quarterly Installment   € 300,000  
Loan repayable quarterly installment commencing date   Sep. 30, 2020  
3.50% Secured Bank Loan | EIB Manufacturing Financing      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Maturity Date Dec. 21, 2026    
Notional amount     € 100,000,000
Term loan (Credit A) € 50,000,000   50,000,000
Term loan (Credit B)     € 50,000,000
3.50% Secured Bank Loan | EIB Manufacturing Financing | Cash Interest Fixed Rate      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Interest rate 1.00%    
3.50% Secured Bank Loan | EIB Manufacturing Financing | Deferred Interest at Fixed Rate      
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]      
Interest rate 2.50%