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Share Capital And Share Premium - Summary of Share Capital And Share Premium (Detail) - CNY (¥)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Share Capital And Share Premium [Line Items]        
Number of share issued   1,231,150,560    
Issuance of ordinary shares, Value   ¥ 17,305,126,000    
Equity ¥ 94,559,203,000 83,151,321,000 ¥ 48,145,417,000 ¥ 34,947,849,000
Retirement of ordinary shares (f) 5,560,104,000      
Exercise of share-based payment 79,651,000      
Share capital [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Issuance of ordinary shares, Value   7,000    
Equity 75,000 77,000 69,000 68,000
Share premium [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Issuance of ordinary shares, Value   17,305,119,000    
Equity 33,365,786,000 ¥ 33,213,426,000 ¥ 14,113,311,000 ¥ 14,113,311,000
Exercise of share-based payment ¥ 152,360,000      
Class A ordinary share [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Issuance of ordinary shares     15,000,000  
Number of share issued     987,146,871 972,146,871
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Shares   136,859,460    
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Shares   (1,124,006,331)    
Class A ordinary share [member] | Share capital [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Issuance of ordinary shares, Value     ¥ 1,000  
Equity     61,000 ¥ 60,000
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Value   ¥ 8,000    
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Value   (69,000)    
Class A ordinary share [member] | Share premium [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Equity     ¥ 3,242,972,000 ¥ 3,242,972,000
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Value   11,278,459,000    
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Value   ¥ (14,521,431,000)    
Class B Ordinary Share [Member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Number of share issued     135,196,846 135,196,846
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Shares   (135,196,846,000)    
Class B Ordinary Share [Member] | Share capital [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Equity     ¥ 8,000 ¥ 8,000
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Value   ¥ (8)    
Class B Ordinary Share [Member] | Share premium [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Equity     ¥ 10,870,339,000 ¥ 10,870,339,000
Conversion of Class B ordinary shares and Class C ordinary shares to Class A ordinary shares, Value   ¥ (10,870,339,000)    
Ordinary Share [Member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Number of share issued 1,203,505,757      
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Shares   1,124,006,331    
Issuance of ordinary shares upon IPO and exercise of over-allotment option, Shares   99,577,564    
Conversion of automatically convertible promissory notes to ordinary shares, Shares   7,566,665    
Issuance of ordinary shares for share-based payment (g), Shares 8,000,000      
Repurchase and retirement of ordinary shares (f), Shares (35,644,803)      
Ordinary Share [Member] | Share capital [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Number of share issued   1,231,150,560    
Equity ¥ 75,000 ¥ 77,000    
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Value   69    
Issuance of ordinary shares upon IPO and exercise of over-allotment option, Value   7,000    
Conversion of automatically convertible promissory notes to ordinary shares, Value   1,000    
Retirement of ordinary shares (f) (2,000)      
Ordinary Share [Member] | Share premium [member]        
Disclosure Of Share Capital And Share Premium [Line Items]        
Equity 33,365,786,000 33,213,426,000    
Re-designation and reclassification of Class A ordinary shares into ordinary shares, Value   14,521,431,000    
Issuance of ordinary shares upon IPO and exercise of over-allotment option, Value   17,305,119,000    
Conversion of automatically convertible promissory notes to ordinary shares, Value   ¥ 1,386,876,000    
Exercise of share-based payment ¥ 152,360,000