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Revenue Recognition - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]    
Remaining performance obligation, amount $ 4,100  
Contract assets $ 83 $ 80
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period 9 months  
Remaining performance obligation, percentage 26.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period 2 years  
Remaining performance obligation, percentage 75.00%  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period 2 years  
Remaining performance obligation, percentage 95.00%  
Fixed Income and Data Services Segment | Services transferred over time | Services transferred over time related to risk management of open interest performance obligations | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01    
Disaggregation of Revenue [Line Items]    
Revenue, remaining performance obligation, expected timing of satisfaction, period 1 month