Other Non-Current Assets (Additional Information) (Details) - Preferred Stock $ in Millions	Nov. 30, 2023 USD ($) shares
Other Non-Current Assets [Line Items]
Cash consideration \| $	$ 5.0
Percentage of investment of Mobility capitalisation	1.00%
Prefered Stock purchased \| shares	700,440

Percentage of investment of Mobility capitalisation

No definition available.

Name:	aeva_PercentageOfInvestmentOfMobilityCapitalisation
Namespace Prefix:	aeva_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant