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Equity Structure (Narrative) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Nov. 10, 2022
shares
Jul. 01, 2021
shares
Jan. 16, 2020
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Jan. 15, 2020
shares
Preferred stock, shares authorized (in shares)       10,000,000 10,000,000  
Preferred stock, par value (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001  
Stock conversion basis at time of business combination         1  
Share-based compensation recognized | $       $ 25,048 $ 10,942  
Issuance of common stock under the ATM | $       $ 10,654    
EVgo Holdings [Member]            
Ownership percentage     100.00%      
Stock options            
Weighted average grant date fair value, granted | $ / shares       $ 8.79    
Unrecognized compensation cost | $       $ 1,600    
Unrecognized compensation cost, period of recognition       1 year 6 months    
Class A Common Stock [Member]            
Common stock, shares authorized (in shares)       1,200,000,000 1,200,000,000  
Common stock, par value (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001  
Voting right per share       one vote    
Common stock, shares issued (in shares)       70,247,726 68,020,630  
Class A Common Stock [Member] | Equity Distribution Agreement | At The Market Offering            
Shares issued       1,588,340    
Issuance of common stock under the ATM | $       $ 10,700    
Commission on issuance of common stock | $       300    
Net proceeds | $       $ 10,400    
Class A Common Stock [Member] | Distribution Agreement | At The Market Offering            
Maximum number of shares available to be sold 200,000,000          
Class B Common Stock [Member]            
Common stock, shares authorized (in shares)       400,000,000 400,000,000  
Common stock, par value (in dollars per share) | $ / shares       $ 0.0001 $ 0.0001  
Voting right per share       one vote    
Common stock, shares issued (in shares)       195,800,000 195,800,000  
Units Issued During Period, Shares, New Issues     195,800,000      
Shares issued   195,800,000        
Class B Common Stock [Member] | Climate Change Crisis Real Impact I Acquisition Corporation [Member]            
Common stock, shares issued (in shares)           5,750,000
EVgo OpCo            
Units Issued During Period, Shares, New Issues     195,800,000 195,800,000