Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2022	Oct. 28, 2022
Entity Listings [Line Items]
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Document Type	10-Q
Entity Registrant Name	EVgo Inc.
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 File Number	001-39572
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	85-2326098
Entity Address, Address Line One	11835 West Olympic Boulevard, Suite 900E
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90064
City Area Code	877
Local Phone Number	494-3833
Entity Central Index Key	0001821159
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2022
Amendment Flag	false
Class A Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		69,359,004
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Trading Symbol	EVGO
Security Exchange Name	NASDAQ
Redeemable Warrants For Class Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50
Trading Symbol	EVGOW
Security Exchange Name	NASDAQ
Class B Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		195,800,000