Goodwill and Other Intangible Assets - Schedule of Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 30,553	$ 21,111
Acquisitions	39	9,417
Foreign currency translation	(21)	24
Other activity, net	24	1
Goodwill, ending balance	30,595	30,553
Exchanges
Goodwill [Roll Forward]
Goodwill, beginning balance	8,155	8,134
Acquisitions	0	0
Foreign currency translation	(19)	21
Other activity, net	0	0
Goodwill, ending balance	8,136	8,155
Fixed Income and Data Services
Goodwill [Roll Forward]
Goodwill, beginning balance	4,854	4,850
Acquisitions	0	0
Foreign currency translation	(1)	3
Other activity, net	0	1
Goodwill, ending balance	4,853	4,854
Mortgage Technology
Goodwill [Roll Forward]
Goodwill, beginning balance	17,544	8,127
Acquisitions	39	9,417
Foreign currency translation	(1)	0
Other activity, net	24	0
Goodwill, ending balance	$ 17,606	$ 17,544