Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) - USD ($)
$ / shares in Units, $ in Billions
 1 Months Ended
May 18, 2016
Jan. 09, 2015
Sep. 30, 2016
Dec. 31, 2015
Dec. 10, 2014
Series A common stock          
Common Stock, Par or Stated Value Per Share     $ 0.01 $ 0.01  
Series B common stock          
Common Stock, Par or Stated Value Per Share     0.01 0.01  
Series C          
Proceeds from Issuance of Common Stock $ 4.4        
Shares issued during period 78,300,000 17,277,224      
Common Stock, Par or Stated Value Per Share $ 0.01   $ 0.01 $ 0.01  
Purchase price (in dollars per share) $ 56.23       $ 40.36