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Summary of Significant Accounting Policies - Additional Information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2022
CNY (¥)
segment
Dec. 31, 2022
USD ($)
segment
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2022
USD ($)
Functional currency and foreign currency translation          
Foreign currency translation adjustment ¥ 717,274 $ 103,995 ¥ (230,345) ¥ 137,596  
Exchange rate (RMB per USD 1.00) 6.8972       6.8972
Short-term investment          
Short-term investments ¥ 19,171,017   37,057,554   $ 2,779,536
Restricted as collateral for bank borrowings and letter of guarantee 12,259,459   6,646,299    
Carrying value of the investment 1,648,861   680,723    
Fair value changes were recorded in other comprehensive income ¥ 746,336   ¥ 24,224    
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration] Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax    
Fair value changes were recorded in other comprehensive income ¥ 746,336 $ 108,209 ¥ 24,224    
Current expected credit losses          
Expected credit loss expense 48,707   54,332 9,654  
Expected credit loss provision - current 50,415   42,040    
Expected credit loss provision - non-current 89,641   49,309    
Long-term investments          
Impairment recognized, long term investments 0   0 0  
Impairment recognized, long-lived assets 35,011 $ 5,076 0 25,757  
Sales and marketing expenses          
Advertising costs 815,619   529,057 266,569  
Employee benefits          
Employee benefit expenses 1,578,273   761,417 366,223  
Dividends          
Dividends ¥ 0   0 ¥ 0  
Segment reporting          
Number of segments | segment 1 1      
Derivatives and Hedging          
Changes in fair value of the derivatives ¥ 668,051   228,887    
Fair Value, Inputs, Level 2          
Short-term investment          
Short-term investments 12,781,060   27,773,387    
Fair Value, Inputs, Level 3          
Short-term investment          
Carrying value of the investment ¥ 1,648,861   ¥ 680,723