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

X

- 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

X

- 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