Investments (Changes In Allowance For Credit Losses Of AFS) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	$ 19	$ 13
Additions for securities for which credit losses were not previously recognized	2
Additions from purchases of PCD debt securities
Additions (reductions) for securities for which credit losses were previously recognized		1
Reductions for securities disposed	(1)
Balance as of end-of-period	20	14
Accrued investment income on fixed maturity AFS securities	1,000	1,000
Corporate Bonds [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	17	12
Additions from purchases of PCD debt securities
Additions (reductions) for securities for which credit losses were previously recognized		1
Reductions for securities disposed	(1)
Balance as of end-of-period	16	13
RMBS [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	1	1
Additions for securities for which credit losses were not previously recognized	1
Additions from purchases of PCD debt securities
Balance as of end-of-period	2	1
Other [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Balance as of beginning-of-period	1
Additions for securities for which credit losses were not previously recognized	1
Additions from purchases of PCD debt securities
Balance as of end-of-period	$ 2