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Cover Page Cover Page
Jul. 29, 2021
Jan. 13, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Jul. 29, 2021  
Entity Registrant Name EMERGENT BIOSOLUTIONS INC.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-33137  
Entity Tax Identification Number 14-1902018  
Entity Address, Address Line One 400 Professional Drive  
Entity Address, Address Line Two Suite 400  
Entity Address, City or Town Gaithersburg  
Entity Address, State or Province MD  
Entity Address, Postal Zip Code 20879  
City Area Code 240  
Local Phone Number 631-3200  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Entity Emerging Growth Company false  
Title of 12(b) Security Common Stock, Par Value $0.001 per share  
Trading Symbol EBS  
Security Exchange Name NYSE  
Entity Central Index Key   0001367644
Amendment Flag   false