| Cover | Jan. 13, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 13, 2025 |
| Entity File Number | 001-41509 |
| Entity Registrant Name | Nxu, Inc. |
| Entity Central Index Key | 0001722969 |
| Entity Tax Identification Number | 92-2819012 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1828 N. Higley Rd. Ste 116 |
| Entity Address, City or Town | Mesa |
| Entity Address, State or Province | AZ |
| Entity Address, Postal Zip Code | 85205 |
| City Area Code | (602) |
| Local Phone Number | 309-5425 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class A Common Stock, par value $0.0001 per share |
| Trading Symbol | NXU |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
