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Revenues - Summary of Disaggregation of Revenue (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	¥ 9,060,784	$ 1,421,835	¥ 6,577,307	¥ 3,956,353
Public Cloud Services [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	6,159,085	966,495	5,166,851	3,458,843
Enterprise Cloud Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,897,817	454,731	1,372,689	486,308
Enterprise Cloud Services [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	2,159,869	338,931	1,368,544	485,991
Enterprise Cloud Services [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	737,948	115,800	4,145	317
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	3,882	609	37,767	11,202
Product and Service, Other [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	1,208	190	36,611	¥ 11,202
Product and Service, Other [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	¥ 2,674	$ 419	¥ 1,156

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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