| Cover | Feb. 25, 2022 |
| Entity Information [Line Items] | |
| Document Type | 8-K/A |
| Document Period End Date | Feb. 25, 2022 |
| Entity Registrant Name | VOLTA INC. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39508 |
| Entity Tax Identification Number | 35-2728007 |
| Entity Address, Address Line One | 155 De Haro Street |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94103 |
| City Area Code | 888 |
| Local Phone Number | 264-2208 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001819584 |
| Amendment Flag | false |
| Class A Common Stock, par value of $0.0001 per share | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A Common Stock, par value of $0.0001 per share |
| Trading Symbol | VLTA |
| Security Exchange Name | NYSE |
| Warrants, each exercisable for one share of Class A Common Stock for $11.50 per share | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Warrants, each exercisable for one share of Class A Common Stock for $11.50 per share |
| Trading Symbol | VLTA WS |
| Security Exchange Name | NYSE |
