XML 70 R64.htm IDEA: XBRL DOCUMENT v3.19.3
Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2018
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Loss Contingencies [Line Items]          
Period of lease extension options   12 years   12 years  
Period of options to terminate lease       1 year  
Contribution to noncontrolling interest       $ 100 $ 116
Affiliated Entity          
Loss Contingencies [Line Items]          
Contribution to noncontrolling interest $ 20        
Minimum          
Loss Contingencies [Line Items]          
Remaining lease terms       1 year  
Maximum          
Loss Contingencies [Line Items]          
Remaining lease terms       14 years  
License Agreement | CME Group | S&P DJ Indices          
Loss Contingencies [Line Items]          
Revenues earned under license agreement   $ 28 $ 28 $ 87 $ 82
Noncontrolling interest ownership by noncontrolling owners (as a percent)   27.00%   27.00%