Goodwill and Other Intangible Assets - Schedule of Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 21,111	$ 21,123
Acquisitions	9,417	46
Foreign currency translation	24	(55)
Other activity, net	1	(3)
Goodwill, ending balance	30,553	21,111
Exchanges
Goodwill [Roll Forward]
Goodwill, beginning balance	8,134	8,185
Acquisitions	0	0
Foreign currency translation	21	(51)
Other activity, net	0	0
Goodwill, ending balance	8,155	8,134
Fixed Income and Data Services
Goodwill [Roll Forward]
Goodwill, beginning balance	4,850	4,816
Acquisitions	0	41
Foreign currency translation	3	(4)
Other activity, net	1	(3)
Goodwill, ending balance	4,854	4,850
Mortgage Technology
Goodwill [Roll Forward]
Goodwill, beginning balance	8,127	8,122
Acquisitions	9,417	5
Foreign currency translation	0	0
Other activity, net	0	0
Goodwill, ending balance	$ 17,544	$ 8,127