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Acquisitions and Divestitures - Schedule of Key Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Total assets	$ 0	$ 1,298
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions	(70)	1,898	$ 11
CGS and LCD
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Deferred tax liability		27
Held for sale \| CGS and LCD
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Accounts Receivable, net	0	88
Goodwill	0	437
Other intangible assets, net	0	697
Other assets	0	76
Total assets	0	1,298
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable and accrued expenses	0	59
Deferred tax liability	0
Unearned revenue	0	148
Liabilities of a business held for sale	0	234
Held for sale or disposed
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Operating profit	19	71	172
Sale
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions	(70)		11
Sale \| Engineering Solutions Business
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions	$ (120)
Sale \| Leveraged Commentary And Data
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions		505
Sale \| Leveraged Loan Indices
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions		52
Sale \| CUSIP Global Services
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions		$ 1,342
Sale \| SPIAS
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions			$ 3