XML 81 R64.htm IDEA: XBRL DOCUMENT v3.19.1
Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Loss Contingencies [Line Items]      
Period of lease extension options   12 years  
Period of options to terminate lease   1 year  
Contribution to noncontrolling interest   $ 18 $ 50
Affiliated Entity      
Loss Contingencies [Line Items]      
Contribution to noncontrolling interest $ 20    
CME Group | S&P DJ Indices      
Loss Contingencies [Line Items]      
Revenues earned under license agreement   $ 29 $ 31
Noncontrolling interest ownership by noncontrolling owners (as a percent)   27.00%  
Minimum      
Loss Contingencies [Line Items]      
Remaining lease terms   1 year  
Maximum      
Loss Contingencies [Line Items]      
Remaining lease terms   14 years