Acquisitions and Divestitures - Schedule of Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale	$ 556	$ 0	$ 1,899	$ 2
Sale | SPIAS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts Receivable, net	0		0		$ 59
Goodwill	0		0		255
Other assets	0		0		7
Assets of businesses held for sale	0		0		321
Accounts payable and accrued expenses	0		0		11
Unearned revenue	0		0		138
Liabilities of businesses held for sale	0		0		$ 149
Operating profit	15	$ 42	48	84
Pre-tax gain on sale				$ 2
Sale | LCD and Leveraged Loan Indices
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale	$ 518		38
Sale | CUSIP Global Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale			$ 1,344