Acquisitions and Divestitures - Schedule of Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale	$ (2)	$ 3	$ 1,897	$ 5
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	(1)	$ 44	56	127
Pre-tax gain (loss) on sale				$ 2
Sale | CUSIP Global Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain (loss) on sale	$ (2)		$ 1,341