Acquisitions and Divestitures - Divestitures Narrative (Details) - USD ($)		1 Months Ended		3 Months Ended	12 Months Ended
	May 02, 2023	Jun. 30, 2022	Feb. 28, 2022	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions					$ (70,000,000)	$ 1,898,000,000	$ 11,000,000
Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions					(70,000,000)		11,000,000
Sale | Engineering Solutions Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions					(120,000,000)
Divestiture consideration	$ 975,000,000
Proceeds from divestiture of business	$ 750,000,000
Disposition related costs					16,000,000
Gain (loss) on disposition after tax					(182,000,000)
Release of deferred tax liabilities					157,000,000
Sale | Leveraged Commentary And Data
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions						505,000,000
Gain (loss) on disposition after tax						378,000,000
Sale | Leveraged Commentary And Data | Market Intelligence
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions					46,000,000
Gain (loss) on disposition after tax					34,000,000
Contingent payment due following closing, period				6 months
Sale | Leveraged Commentary And Data | Indices
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions					4,000,000
Gain (loss) on disposition after tax					$ 3,000,000
Sale | Leveraged Commentary And Data And Leveraged Loan Indices
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions						1,900,000,000
Divestiture consideration		$ 600,000,000
Contingent payment		$ 50,000,000
Contingent consideration, maximum period until achieved consideration is payable		6 months
Sale | Leveraged Loan Indices
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions						52,000,000
Gain (loss) on disposition after tax						43,000,000
Sale | Base Chemicals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions		$ 0
Divestiture consideration		$ 295,000,000
Sale | CUSIP Global Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions						1,342,000,000
Divestiture consideration								$ 1,925,000,000
Gain (loss) on disposition after tax						$ 1,005,000,000.000
Sale | OPIS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions			$ 0
Divestiture consideration			$ 1,150,000,000
Sale | Office facility in India
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions							8,000,000
Gain (loss) on disposition after tax							6,000,000
Sale | SPIAS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on dispositions							3,000,000
Gain (loss) on disposition after tax							$ 3,000,000