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Revenues - Additional Information (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 CNY (¥)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 CNY (¥)
Revenue recognized contract liability	¥ 3,828	$ 555
Reclassified From Cost And Estimated Earnings In Excess Of Billings To Accounts Receivable [Member]
Cost and estimated earnings in excess of billings			¥ 717
General and Administrative Expense [Member]
Decrease in unbilled revenue was due to impairment of balances amount			2,800
Decrease in accounts receivable caused by impairment	¥ 46,045	$ 6,676	¥ 59,347

X

- Definition

Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings.

+ References

No definition available.

+ Details

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Namespace Prefix:	eh_
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Balance Type:	debit
Period Type:	instant

X

- Definition

Decrease in accounts receivable caused by impairment.

+ References

No definition available.

+ Details

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Namespace Prefix:	eh_
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Balance Type:	debit
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X

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045

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X

- Definition

The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

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- Details

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X

- Details

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