v3.5.0.2
Deferred Revenue Deferred Revenue (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 $ 190  
Additions 681  
Amortization (429)  
Deferred revenue balance at June 30, 2016 442  
Deferred revenue 330 $ 98
Deferred Revenue, Noncurrent 112  
Annual Listing Fee Revenue    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 0  
Additions 363  
Amortization (183)  
Deferred revenue balance at June 30, 2016 180  
Original Listing Fee Revenues    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 50  
Additions 12  
Amortization (4)  
Deferred revenue balance at June 30, 2016 58  
Other Listing Fee Revenues    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 59  
Additions 43  
Amortization (21)  
Deferred revenue balance at June 30, 2016 81  
Data Services Fees and Other Revenues    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 81  
Additions 263  
Amortization (221)  
Deferred revenue balance at June 30, 2016 $ 123