Acquisitions and Divestitures - Merger with IHS Markit (Details) $ in Billions	Feb. 28, 2022 USD ($)
IHS Markit
Business Acquisition [Line Items]
Fair value of S&P Global common stock and replacement equity awards	$ 43.5

Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant