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v3.23.1

Fair Value Measurements - Additional Information (Detail) | Dec. 31, 2022
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Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Percentage Of Assets Invest In Temporary Assets | 100.00%

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- Definition Percentage of assets invest in temporary assets. + References No definition available. + Details
Name: | eh_PercentageOfAssetsInvestInTemporaryAssets
Namespace Prefix: | eh_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration