Document and Entity Information
Sep. 26, 2019
Document and Entity Information [Abstract]  
Document Type 8-K
Document Period End Date Sep. 26, 2019
Entity File Number 001-37687
Entity Registrant Name Editas Medicine, Inc.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 46-4097528
Entity Address, Address Line One 11 Hurley Street
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02141
City Area Code 617
Local Phone Number 401-9000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, $0.0001 par value per share
Trading Symbol EDIT
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Entity Central Index Key 0001650664
Amendment Flag false