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Investments in Subsidiaries - Additional Information (Detail)
¥ in Millions, $ in Millions
Feb. 28, 2019
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Disclosure of subsidiaries [line items]        
Cash and cash equivalents subject to local exchange control regulations   ¥ 4,200.5 $ 664.4 ¥ 5,289.2
Bottom of range [member]        
Disclosure of subsidiaries [line items]        
Percent of shareholding in subsidiary 67.50%      
Top of range [member]        
Disclosure of subsidiaries [line items]        
Percent of shareholding in subsidiary 75.00%      
YC Europe Co [member]        
Disclosure of subsidiaries [line items]        
Percentage of equity interest acquired 7.50%      
Cash consideration ¥ 0.1