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Significant equity transactions, restructuring transactions, mergers and acquisitions and equity investments- IPO (Details)
$ / shares in Units, $ in Billions
Sep. 24, 2014
USD ($)
$ / shares
shares
ADS | Other selling shareholders named in the prospectus  
Initial public offering  
Number of shares offered 197,029,169
IPO  
Initial public offering  
Number of ordinary shares represented by each ADS 1
Net proceeds raised by the Company from the initial public offering | $ $ 10.0
IPO | ADS  
Initial public offering  
Number of shares offered 123,076,931
Share price | $ / shares $ 68.00
Underwriters' option | ADS  
Initial public offering  
Number of shares offered 26,143,903
Share price | $ / shares $ 68.00
Underwriters' option | ADS | Other selling shareholders named in the prospectus  
Initial public offering  
Number of shares offered 21,871,997