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Capital Structure - Additional Information (Details)
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Mar. 12, 2021
shares
Dec. 31, 2020
$ / shares
shares
Class Of Stock [Line Items]      
Preferred stock, par value | $ / shares $ 0.0001    
Temporary equity, shares authorized 432,000,000 432,000,000  
Common stock, shares authorized 422,000,000 422,000,000 422,000,000
Preferred stock, shares authorized 10,000,000 10,000,000  
Preferred Stock, Conversion Basis 1:1 basis    
Conversion Ration 9.07659    
Preferred stock, shares issued 0    
Pre-combination Aeva preferred stock outstanding 0    
Common Stock Par Or Stated Value Per Share | $ / shares $ 0.0001   $ 0.0001
Series B Preferred Stock [Member]      
Class Of Stock [Line Items]      
Preferred stock, par value | $ / shares $ 0.001    
Public Warrants [Member]      
Class Of Stock [Line Items]      
Class of Warrant or Right, Outstanding 12,075,000    
Common Stock Par Or Stated Value Per Share | $ / shares $ 11.50    
Private Warrants [Member]      
Class Of Stock [Line Items]      
Class of Warrant or Right, Outstanding 384,000    
Common Stock Par Or Stated Value Per Share | $ / shares $ 11.50