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Share-based Compensation - Restricted Share Unit Award Activities - Narrative (Details) - Restricted share units
$ / shares in Units, $ in Billions
Dec. 31, 2023
USD ($)
$ / shares
shares
2009 Restricted Share Unit Plan and 2019 Restricted Share Unit Plan  
Share based Compensation  
Aggregate intrinsic value of RSUs outstanding | $ $ 1.1
Company's closing stock price per ADS used to calculate intrinsic value | $ / shares $ 93.16
2019 Restricted Share Unit Plan  
Share based Compensation  
Number of shares available for future grant | shares 236,724,510