v3.22.2.2
Cover
Sep. 09, 2022
Entity Information [Line Items]  
Document Period End Date Sep. 09, 2022
Entity Registrant Name bluebird bio, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-35966
Entity Tax Identification Number 13-3680878
Entity Address, Address Line One 455 Grand Union Boulevard
Entity Address, City or Town Somerville
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02145
City Area Code 339
Local Phone Number 499-9300
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.01 par value per share
Trading Symbol BLUE
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001293971
Amendment Flag false
Document Type 8-K