v3.5.0.2
Deferred Revenue Deferred Revenue (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 $ 190  
Additions 788  
Amortization (644)  
Deferred revenue balance at June 30, 2016 334  
Deferred revenue 217 $ 98
Deferred Revenue, Noncurrent 117  
Annual Listing Fee Revenue    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 0  
Additions 363  
Amortization (274)  
Deferred revenue balance at June 30, 2016 89  
Original Listing Fee Revenues    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 50  
Additions 15  
Amortization (7)  
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 57  
Amortization (33)  
Deferred revenue balance at June 30, 2016 83  
Data Services Fees and Other Revenues    
Movement in Deferred Revenue [Roll Forward]    
Deferred revenue balance at December 31, 2015 81  
Additions 353  
Amortization (330)  
Deferred revenue balance at June 30, 2016 $ 104