Acquisitions and Divestitures - Narrative (Details) - USD ($)		1 Months Ended		3 Months Ended			6 Months Ended
	May 02, 2023	Jun. 30, 2022	Feb. 28, 2022	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2022
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale				$ (119,000,000)		$ 556,000,000	$ (69,000,000)	$ 1,899,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Engineering Solutions Segment
Business Acquisition [Line Items]
Divestiture consideration	$ 975,000,000
Proceeds from divestiture of business	750,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Engineering Solutions Business
Business Acquisition [Line Items]
Divestiture consideration	975,000,000
Proceeds from divestiture of business	$ 750,000,000
Pre-tax gain (loss) on sale				(120,000,000)			(120,000,000)
Disposition related costs				3,000,000			16,000,000
Gain (loss) on disposition after tax				(189,000,000)			(182,000,000)
Release of deferred tax liabilities				$ 101,000,000			157,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale						518,000,000		518,000,000
Gain (loss) on disposition after tax						396,000,000		396,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD | Market Intelligence
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale							46,000,000
Gain (loss) on disposition after tax							34,000,000
Contingent payment due following closing, period					6 months
Disposal Group, Disposed of by Sale, Not Discontinued Operations | LCD | Indices
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale							4,000,000
Gain (loss) on disposition after tax							$ 3,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Leveraged Commentary And Data And Leveraged Loan Indices
Business Acquisition [Line Items]
Divestiture consideration		$ 600,000,000				600,000,000		600,000,000
Contingent payment		$ 50,000,000
Contingent consideration, maximum period until achieved consideration is payable		6 months
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Leveraged Loan Indices
Business Acquisition [Line Items]
Pre-tax gain (loss) on sale						38,000,000		38,000,000
Gain (loss) on disposition after tax						31,000,000		31,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Base Chemicals
Business Acquisition [Line Items]
Divestiture consideration		$ 295,000,000				$ 295,000,000		295,000,000
Pre-tax gain (loss) on sale		$ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | CUSIP Global Services
Business Acquisition [Line Items]
Divestiture consideration									$ 1,925,000,000
Pre-tax gain (loss) on sale								1,344,000,000
Gain (loss) on disposition after tax								$ 1,006,000,000.000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | OPIS
Business Acquisition [Line Items]
Divestiture consideration			$ 1,150,000,000
Pre-tax gain (loss) on sale			0
IHS Markit
Business Acquisition [Line Items]
Fair value of S&P Global common stock and replacement equity awards			$ 43,500,000,000