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Related Party Transactions - Schedule Of Related Party Balances (Parenthetical) (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)
Related Party Transaction [Line Items]
Short-term Debt	¥ 1,348,166	$ 211,557	¥ 278,488
Short-term Debt, Current	1,348,166	211,557	¥ 278,488
Kingsoft Group [Member]
Related Party Transaction [Line Items]
Short-term Debt	¥ 500,000	$ 78,461
Short-term Debt, Percentage Bearing Fixed Interest Rate	4.65%	4.65%
Short-term Debt, Terms	November 2022
Short-term Debt, Current	¥ 500,000	$ 78,461
Xiaomi Group [Member]
Related Party Transaction [Line Items]
Short-term Debt	236,206	37,066
Short-term Debt, Current	236,206	37,066
Short-term Debt, Non Current	¥ 472,882	$ 74,206
Related party transaction, Terms and manner of settlement	3
Xiaomi Group [Member] | Weighted Average [Member]
Related Party Transaction [Line Items]
Related party transaction, Rate	4.36%

X

- Definition

Short term debt non current.

+ References

No definition available.

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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

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X

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Definition

Description of the terms and manner of settlement of the related party transaction.

+ References

No definition available.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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-Name Accounting Standards Codification
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-Topic 942
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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X

- Definition

The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date which accrues interest at a set, unchanging rate.

+ References

No definition available.

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- Definition

Description of the short-term debt arrangement, and disclosures pertaining to the underlying arrangements, including repayment terms, interest rates, restrictions on assets and activities, debt covenants, and other matters important to users of the financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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