v3.26.1
Long-Term Debt - Credit Agreement (Details) - EVgo Voyager Borrower LLC (Subsidiary of the Company)
$ in Millions
Jul. 23, 2025
USD ($)
stall
Jun. 30, 2026
USD ($)
Voyager credit agreement    
Long-Term Debt    
Term facility, maximum borrowing capacity $ 300.0  
Minimum percentage of original aggregate amount (as a percent) 95.00%  
Maximum percentage of proceeds to be used for reimbursement of certain costs (as a percent) 60.00%  
Number of stalls expected to get support from this loan arrangement | stall 1,900  
Estimate number of new stalls to be deploy from this loan arrangement | stall 1,500  
Number of stalls contributed as collateral | stall 400  
Loan outstanding   $ 71.1
Unused borrowing capacity amount   $ 153.4
Weighted average interest rate (as a percent)   6.98%
Voyager credit agreement, Commitments    
Long-Term Debt    
Term facility, maximum borrowing capacity $ 225.0  
Voyager credit agreement, Incremental Facility    
Long-Term Debt    
Term facility, maximum borrowing capacity $ 75.0  
Closing date until the fourth anniversary | SOFR    
Long-Term Debt    
Basis spread on variable rate (as a percent) 3.25%  
Closing date until the fourth anniversary | ABR    
Long-Term Debt    
Basis spread on variable rate (as a percent) 2.25%  
Period from fourth anniversary of closing date and thereafter | SOFR    
Long-Term Debt    
Basis spread on variable rate (as a percent) 3.50%  
Period from fourth anniversary of closing date and thereafter | ABR    
Long-Term Debt    
Basis spread on variable rate (as a percent) 2.50%