Investments (Changes In Allowance For Credit Losses Of AFS) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance	$ 21	$ 19
Additions for securities for which credit losses were not previously recognized	18	2
Additions (reductions) for securities for which credit losses were previously recognized	(1)
Reductions for securities disposed	(1)	(1)
Balance	37	20
Accrued investment income on fixed maturity AFS securities	1,100	1,000
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance	9	17
Additions for securities for which credit losses were not previously recognized	18
Reductions for securities disposed	(1)	(1)
Balance	26	16
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance	7	1
Additions for securities for which credit losses were not previously recognized		1
Additions (reductions) for securities for which credit losses were previously recognized	(1)
Balance	6	2
Other Securities [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance	5	1
Additions for securities for which credit losses were not previously recognized		1
Balance	$ 5	$ 2