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Document and Entity Information
Sep. 26, 2022
Entity Listings [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 26, 2022
Entity File Number 001-39204
Entity Registrant Name Aeva Technologies, Inc.
Entity Central Index Key 0001789029
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 84-3080757
Entity Address, Address Line One 555 Ellis Street
Entity Address, City or Town Mountain View
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94043
City Area Code 650
Local Phone Number 481-7070
Entity Emerging Growth Company false
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common stock, par value $0.0001 per share [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Common stock, par value $0.0001 per share
Trading Symbol AEVA
Security Exchange Name NYSE
Warrants to purchase one share of common stock [Member]  
Entity Listings [Line Items]  
Title of 12(b) Security Warrants to purchase one share of common stock
Trading Symbol AEVA.WS
Security Exchange Name NYSE