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Share-based Compensation (Details)
¥ in Thousands
1 Months Ended 12 Months Ended
Dec. 20, 2013
$ / shares
Dec. 20, 2013
CNY (¥)
shares
Dec. 31, 2013
shares
Dec. 31, 2015
CNY (¥)
shares
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Share-based compensation            
Share-based compensation charge | ¥       ¥ 1,193,945 ¥ 4,249,548 ¥ 261,173
Number of ordinary shares available for future grants       195,907,439    
Share option exchange program            
Share-based compensation            
Incremental value of shares as a result of share exchange recognized as compensation expense (in CNY) | ¥   ¥ 89,030        
Share option exchange program | Minimum            
Share-based compensation            
Year in which shares are vested   1 year        
Share option exchange program | Maximum            
Share-based compensation            
Year in which shares are vested   6 years        
Share option exchange program | RSUs            
Share-based compensation            
Number of unvested RSUs exchanged (in shares)   7,954,526 7,954,526      
Share option exchange program | Employee options            
Share-based compensation            
Exercise price of shares exchanged (in dollars per share) | $ / shares $ 3.96          
Number of options issued upon exchange of unvested RSUs (in shares)   23,863,578