| Cover | Aug. 26, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | On September 1, 2021, Volta Inc., a Delaware corporation (f/k/a Tortoise Acquisition Corp. II) (the “Company”), filed a Current Report on Form 8-K (the “Original Report”) to report the Closing and related matters under Items 1.01, 2.01, 3.02, 3.03, 4.01, 5.01, 5.02, 5.06 and 9.01 of Form 8-K. Due to the large number of events to be reported under the specified items of Form 8-K, this Amendment No. 1 to Form 8-K is being filed to amend the Original Report to include additional matters related to the transactions under Items 5.03 and 5.05 of Form 8-K. Capitalized terms used herein but not defined herein have the meanings given to such terms in the Original Report. |
| Document Period End Date | Aug. 26, 2021 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-39508 |
| Entity Registrant Name | VOLTA INC. |
| Entity Central Index Key | 0001819584 |
| Entity Tax Identification Number | 99-1550630 |
| Entity Incorporation, State or Country Code | DE |
| 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 | (415) |
| Local Phone Number | 583-3805 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Class A Common Stock, par value of $0.0001 per share | |
| Affiliate, Collateralized Security [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 | |
| Affiliate, Collateralized Security [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 |
