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Document and Entity Information
Jul. 07, 2021
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001745999
Document Type 8-K
Document Period End Date Jul. 07, 2021
Entity Registrant Name BEAM THERAPEUTICS INC.
Entity Incorporation State Country Code DE
Entity File Number 001-39208
Entity Tax Identification Number 81-5238376
Entity Address, Address Line One 26 Landsdowne St.
Entity Address, City or Town Cambridge
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02139
City Area Code (857)
Local Phone Number 327-8775
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.01 per share
Trading Symbol BEAM
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false