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Redeemable noncontrolling interest - Narrative (Details) - EVgo OpCo | 3 Months Ended
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Mar. 31, 2022 shares
Units Issued During Period, Shares, New Issues | 195,800,000
Post-transaction ownership percentage of the target business | 73.90%
Class B Common Stock [Member] |
Post transaction voting interest percentage of the target business | 73.90%

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- Definition Post-transaction ownership percentage of the outstanding voting securities of the target business or assets sufficient for it not to be required to register as an investment company under the Investment Company Act of 1940. + References No definition available. + Details
Name: | evgo_PostTransactionOwnershipPercentageOfTheTargetBusiness
Namespace Prefix: | evgo_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Post transaction voting interest percentage of the target business. + References No definition available. + Details
Name: | evgo_PostTransactionVotingInterestPercentageOfTargetBusiness
Namespace Prefix: | evgo_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of new units issued during the period. Each unit consists of one share of Class A common stock and one redeemable warrant. + References No definition available. + Details
Name: | evgo_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | evgo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |