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Shareholder's Equity - Additional Information (Detail)
$ / shares in Units, ¥ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Jan. 31, 2025
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2023
CNY (¥)
shares
Dec. 31, 2022
CNY (¥)
shares
Dec. 31, 2024
CNY (¥)
shares
Dec. 31, 2023
$ / shares
Dec. 31, 2023
CNY (¥)
shares
Feb. 28, 2023
USD ($)
Dec. 31, 2020
USD ($)
Aug. 31, 2020
USD ($)
May 13, 2020
USD ($)
Stockholders Equity Note [Line Items]                        
Shares authorized   69,632,000,000       69,632,000,000            
Transfer of Class B ordinary shares to Class A Ordinary shares   440,000 440,000 17,320,000 17,200,000              
Number of Class A ordinary shares repurchased   76,933,844 76,933,844 42,661,000 17,307,400              
Allocation of after-tax profits to statutory surplus fund, percentage   10.00% 10.00%                  
Limit of statutory surplus fund as a percentage of registered capital, after which allocations to statutory surplus fund are no longer required   50.00% 50.00%                  
Amounts of restricted paid up capital and statutory reserve funds of PRC subsidiaries and net assets of VIEs   $ 6,600       ¥ 48,100   ¥ 48,000        
Foreign currency translation adjustment   $ 81 ¥ 530 ¥ 687 ¥ 2,100              
Balance number of Treasury stock, shares   83,456,676       83,456,676   41,182,672        
Stock retired during period, shares 54,938,160                      
Stock Issued During Period exercise of share options and vesting of restricted shares   34,659,840 34,659,840                  
2020 Shares Repurchase Program                        
Stockholders Equity Note [Line Items]                        
Stock repurchase program, proposed aggregate value | $                   $ 4,500 $ 3,000 $ 1,000
2023 Shares Repurchase Program                        
Stockholders Equity Note [Line Items]                        
Stock repurchase program, proposed aggregate value | $                 $ 5,000      
Preferred Stock                        
Stockholders Equity Note [Line Items]                        
Preferred stock, shares authorized   800,000,000       800,000,000            
Class A Ordinary Shares                        
Stockholders Equity Note [Line Items]                        
Common stock, shares authorized   66,000,000,000       66,000,000,000   66,000,000,000        
Par value per share (US$) | $ / shares   $ 0.000000625         $ 0.000000625          
Aggregate purchase price   $ 886 ¥ 6,400 ¥ 4,800 ¥ 1,900              
Class B Ordinary Shares                        
Stockholders Equity Note [Line Items]                        
Common stock, shares authorized   2,832,000,000       2,832,000,000   2,832,000,000        
Par value per share (US$) | $ / shares   $ 0.000000625         $ 0.000000625          
Number of votes per share   ten ten