Capital Structure - Additional Information (Details)	6 Months Ended
	Jun. 30, 2022 $ / shares shares	Dec. 31, 2021 $ / shares shares	Mar. 12, 2021 shares
Class Of Stock [Line Items]
Temporary equity, shares authorized | shares	432,000,000		432,000,000
Common stock, shares authorized | shares	422,000,000	422,000,000	422,000,000
Preferred Stock, Conversion Basis	1:1 basis
Conversion Ratio	0.0907659
Preferred stock, par value | $ / shares	$ 0.0001
Preferred stock, shares authorized | shares	10,000,000		10,000,000
Preferred stock, shares issued | shares	0	0
Pre-combination Aeva preferred stock outstanding | shares	0	0
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.0001	$ 0.0001
Series Seed Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares	0.001
Series A-1 Preferred Stock [Member]
Class Of Stock [Line Items]
Preferred stock, par value | $ / shares	0.001
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]
Common Stock, Par or Stated Value Per Share | $ / shares	$ 11.50
Class of Warrant or Right, Outstanding | shares	12,074,880
Private Warrants [Member]
Class Of Stock [Line Items]
Common Stock, Par or Stated Value Per Share | $ / shares	$ 11.50
Class of Warrant or Right, Outstanding | shares	384,000