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Events After the Reporting Period - Additional Information (Details) - Supply Of COVID-19 Vaccine - Pfizer Inc.
Feb. 17, 2021
Dose
State
Feb. 12, 2021
Dose
Disclosure Of Events After Reporting Period [Line Items]    
Number of European Union member states. | State 27  
U.S. Government    
Disclosure Of Events After Reporting Period [Line Items]    
Number of additional doses of COVID-19 vaccine to be supplied   100,000,000
Total number of doses of COVID-19 vaccine to be supplied   300,000,000
European Union Member States    
Disclosure Of Events After Reporting Period [Line Items]    
Number of additional doses of COVID-19 vaccine to be supplied 200,000,000  
Option to request supply of number of additional doses of COVID-19 vaccine 100,000,000