Investments (Changes In Allowance For Credit Losses On AFS) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	$ 20	$ 0
Additions for securities for which credit losses were not previously recognized	19	39
Reductions for securities disposed	(17)	(17)
Balance as of end of-period	22	22
Accrued interest receivable on fixed maturity AFS securities		1,000
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	20
Additions for securities for which credit losses were not previously recognized	17	37
Reductions for securities disposed	(17)	(17)
Balance as of end of-period	20	20
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Additions for securities for which credit losses were not previously recognized	1	1
Balance as of end of-period	1	1
ABS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Additions for securities for which credit losses were not previously recognized	1	1
Balance as of end of-period	$ 1	$ 1