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Financial Instruments And Risks - Additional Information (Detail) - CNY (¥)
¥ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Expected credit loss rate 7.12% 6.08%
Wealth Management Products Investments [Member]    
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Transfers into Level 3 of fair value hierarchy, assets ¥ 1,035.6  
Increase In Upside Scenario [Member]    
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Expected credit loss rate   10.00%
Cumulative expected credit loss estimated decrease in impairment provision   ¥ 5.0
Reduction In Downside Scenario [Member]    
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Expected credit loss rate 10.00%  
Cumulative expected credit loss estimated decrease in impairment provision ¥ 15.0  
Reduction In Base Case Scenario [Member]    
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Expected credit loss rate 10.00%  
Cumulative expected credit loss estimated increase in impairment provision ¥ 32.0  
Increase In Downside Scenario [Member]    
Disclosure Of Macroeconomic Assumptions For Calculating Expected Credit Losses [Line Items]    
Expected credit loss rate   10.00%
Cumulative expected credit loss estimated increase in impairment provision   ¥ 6.0