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Net Loss Per Share - Narrative (Details) - shares		3 Months Ended
	Jul. 01, 2021	Mar. 31, 2022
EVgo OpCo
Earnings per share
Units Issued During Period, Shares, New Issues		195,800,000
Class B Common Stock [Member]
Earnings per share
Shares issued	195,800,000
Class B Common Stock [Member] | EVgo OpCo
Earnings per share
Shares transferred per agreement	195,800,000

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Number of new stock issued during the period.

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