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Acquisition - Schedule Of Recognized Identified Assets Acquired And Liabilities Assumed (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2021 USD ($)
Goodwill	¥ 4,071,391	¥ 4,071,391	$ 638,890
Customer relationship [Member]
Intangible assets, Estimated useful life	5 years
TTP Car Inc. ("TTP") [Member]
Goodwill		2,567,113
Net liabilities acquired, excluding intangible assets and the related deferred tax liabilities		(861,918)
Deferred tax liabilities		(63,570)
Noncontrolling interests		(147,639)
Convertible redeemable noncontrolling interests		(1,056,237)
Recognized Identifiable Assets Acquired and Liabilities Assumed		861,549
TTP Car Inc. ("TTP") [Member] | Technologies [Member]
Intangible assets		¥ 202,100
Intangible assets, Estimated useful life		5 years
TTP Car Inc. ("TTP") [Member] | Trademarks [Member]
Intangible assets		¥ 106,900
Intangible assets, Estimated useful life		10 years
TTP Car Inc. ("TTP") [Member] | Customer relationship [Member]
Intangible assets		¥ 41,300
Intangible assets, Estimated useful life		5 years
TTP Car Inc. ("TTP") [Member] | Database [Member]
Intangible assets		¥ 73,500
Intangible assets, Estimated useful life		5 years

X

- Definition

Business combination acquisition of less than 100 percent redeemable noncontrolling interest fair value.

+ References

No definition available.

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X

- Definition

Business combination recognized identifiable assets acquired and liabilities assumed, liabilities assumed excluding deferred Taxes And intangible assets.

+ References

No definition available.

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- Definition

This element represents the fair value of the noncontrolling interest in the acquiree at the acquisition date.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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