Acquisitions and Divestitures - Schedule of Components of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale	$ 1,344	$ 2
Sale | SPIAS
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts Receivable, net	26	59
Goodwill	381	255
Other assets	0	7
Assets of businesses held for sale	407	321
Accounts payable and accrued expenses	0	11
Unearned revenue	66	138
Liabilities of businesses held for sale	66	149
Operating profit	34	42
Pre-tax gain on sale	$ 1,300	$ 2