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Commitments and Contingencies - Narrative (Details)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 03, 2024
USD ($)
Feb. 02, 2021
entity
Mar. 31, 2023
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Loss Contingencies [Line Items]            
Option to extend lease period (in years)       12 years    
Lease impairment charges       $ 3 $ 26 $ 132
Revenue       $ 14,208 12,497 11,181
Loss contingency accrual, payments $ 20          
Amazon Web Services            
Loss Contingencies [Line Items]            
Collaborative arrangement, purchase obligation     $ 1,000      
Collaborative arrangement, contractual period (in years)     5 years      
Basis Capital Investment Group, Investment Losses on Collateralized Debt Obligations            
Loss Contingencies [Line Items]            
Loss contingency, number of plaintiffs | entity   2        
CME Group            
Loss Contingencies [Line Items]            
Noncontrolling interest ownership by noncontrolling owners (as a percent)       27.00%    
S&P/DJ Indices | CME Group            
Loss Contingencies [Line Items]            
Noncontrolling interest ownership by noncontrolling owners (as a percent)       27.00%    
S&P/DJ Indices | Related Party            
Loss Contingencies [Line Items]            
Revenue       $ 192 $ 174 $ 170
Minimum            
Loss Contingencies [Line Items]            
Remaining lease terms (in years)       1 year    
Maximum            
Loss Contingencies [Line Items]            
Remaining lease terms (in years)       11 years