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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, 2022	Dec. 31, 2021	Dec. 31, 2020
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Total assets	$ 1,298	$ 321
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions	1,898	11	$ 16
CGS and LCD
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Deferred tax liability		0
Held for sale | CGS and LCD
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Accounts Receivable, net	88	59
Goodwill	437	255
Other intangible assets, net	697	0
Other assets	76	7
Total assets	1,298	321
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]
Accounts payable and accrued expenses	59	11
Deferred tax liability	27
Unearned revenue	148	138
Liabilities of businesses held for sale	234	149
Held for sale or disposed
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Operating profit	71	172	162
Sale
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions	1,900	11	16
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	1
Sale | IR webhosting business
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Pre-tax gain (loss) on dispositions			$ 11

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