Cover Page - shares	3 Months Ended
	Mar. 31, 2022	May 13, 2022
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-439508
Entity Registrant Name	Volta Inc.
Entity Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Class A common stock, par value of $0.0001 per share
Trading Symbol	VLTA
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Central Index Key	0001819584
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false
Warrants
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
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		167,238,734
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		395,335