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Share-Based Payments - Summary of Expense Recognized for Employee Services Received (Details)
€ in Millions, £ in Millions
 1 Months Ended 12 Months Ended
May 31, 2022
EUR (€)
May 31, 2021
EUR (€)
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
Dec. 31, 2023
GBP (£)
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     € 44.1 € 46.5 € 61.0  
Expense / (Income) arising from cash-settled share-based payment arrangements     7.3 61.5 32.7  
Total     51.4 108.0 93.7  
Cost of sales            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Total     6.5 3.0 7.0  
Research and development expenses            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Total     33.4 84.6 60.5  
Sales and marketing expenses            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Total     1.0 0.8 0.5  
General and administrative expenses            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Total     10.5 19.6 25.7  
Employee Stock Ownership Plan            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     0.0 13.8 20.2  
Expense / (Income) arising from cash-settled share-based payment arrangements     (0.9) 53.4 6.3  
Chief Executive Officer Grant            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     1.2 3.1 5.9  
Management Board Grant            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     3.2 4.3 2.4  
Expense / (Income) arising from cash-settled share-based payment arrangements     (2.4) 0.0 3.6  
Reclassification for share-based payment arrangement € 3.3 € 1.1        
BioNTech 2020 Employee Equity Plan for Employees Based Outside North America            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     36.3 25.3 32.5  
InstaDeep Employee Incentive Plan            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense arising from equity-settled share-based payment arrangements     3.4 0.0 0.0  
Long-term deposits | £           £ 15.0
BioNTech Restricted Stock Unit Plan for North America Employees            
Disclosure of terms and conditions of share-based payment arrangement [line items]            
Expense / (Income) arising from cash-settled share-based payment arrangements     € 10.6 € 8.1 € 22.8