Insurance (Obligations Under Funding Agreements - Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Outstanding funding agreements to certain SPEs	$ 4,700	$ 0
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	500	595
Outstanding funding agreements to certain SPEs - Inactive	134	144
Federal Home Loan Bank of Atlanta
Line of Credit Facility [Line Items]
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances	900	0
Farmer Mac Funding Agreements [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	$ 125	$ 0