Goodwill and Other Intangible Assets - Schedule of Goodwill Rollforward (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 30,646
Acquisitions	33
Foreign currency translation	(15)
Goodwill, ending balance	30,664
Exchanges Segment
Goodwill [Roll Forward]
Goodwill, beginning balance	8,175
Acquisitions	0
Foreign currency translation	(12)
Goodwill, ending balance	8,163
Fixed Income and Data Services Segment
Goodwill [Roll Forward]
Goodwill, beginning balance	4,864
Acquisitions	0
Foreign currency translation	(1)
Goodwill, ending balance	4,863
Mortgage Technology Segment
Goodwill [Roll Forward]
Goodwill, beginning balance	17,607
Acquisitions	33
Foreign currency translation	(2)
Goodwill, ending balance	$ 17,638

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details