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Goodwill and Other Intangible Assets - Schedule of Change in Carrying Amount of Goodwill (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Roll Forward]    
Goodwill, beginning balance $ 34,850 $ 34,545
Acquisitions 245 239
Dispositions (80)  
Other (98) 66
Goodwill, ending balance 34,917 34,850
Operating Segments | Market Intelligence    
Goodwill [Roll Forward]    
Goodwill, beginning balance 18,183 18,110
Acquisitions 229 62
Dispositions (80)  
Other (26) 11
Goodwill, ending balance 18,306 18,183
Operating Segments | Ratings    
Goodwill [Roll Forward]    
Goodwill, beginning balance 274 257
Acquisitions 0 3
Dispositions 0  
Other (15) 14
Goodwill, ending balance 259 274
Operating Segments | Commodity Insights    
Goodwill [Roll Forward]    
Goodwill, beginning balance 5,538 5,522
Acquisitions 16 6
Dispositions 0  
Other (4) 10
Goodwill, ending balance 5,550 5,538
Operating Segments | Mobility    
Goodwill [Roll Forward]    
Goodwill, beginning balance 8,863 8,695
Acquisitions 0 168
Dispositions 0  
Other (5) 0
Goodwill, ending balance 8,858 8,863
Operating Segments | Indices    
Goodwill [Roll Forward]    
Goodwill, beginning balance 1,417 1,399
Acquisitions 0 0
Dispositions 0  
Other (48) 18
Goodwill, ending balance 1,369 1,417
Corporate    
Goodwill [Roll Forward]    
Goodwill, beginning balance 575 562
Acquisitions 0 0
Dispositions 0  
Other 0 13
Goodwill, ending balance $ 575 $ 575