Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 3,735	$ 3,575
Acquisitions	54	138
Dispositions		(2)
Reclassifications	(255)
Other	(28)	24
Goodwill, ending balance	3,506	3,735
Operating Segments | Ratings
Goodwill [Roll Forward]
Goodwill, beginning balance	263	115
Acquisitions	0	138
Dispositions		0
Reclassifications	0
Other	(18)	10
Goodwill, ending balance	245	263
Operating Segments | Market Intelligence
Goodwill [Roll Forward]
Goodwill, beginning balance	2,071	2,062
Acquisitions	0	0
Dispositions		(2)
Reclassifications	(255)
Other	(8)	11
Goodwill, ending balance	1,808	2,071
Operating Segments | Platts
Goodwill [Roll Forward]
Goodwill, beginning balance	527	521
Acquisitions	0	0
Dispositions		0
Reclassifications	0
Other	(2)	6
Goodwill, ending balance	525	527
Operating Segments | Indices
Goodwill [Roll Forward]
Goodwill, beginning balance	376	376
Acquisitions	0	0
Dispositions		0
Reclassifications	0
Other	0	0
Goodwill, ending balance	376	376
Corporate
Goodwill [Roll Forward]
Goodwill, beginning balance	498	501
Acquisitions	54	0
Dispositions		0
Reclassifications	0
Other	0	(3)
Goodwill, ending balance	$ 552	$ 498