Investments (Changes In Allowance For Credit Losses On Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance	$ 77	$ 184	$ 96	$ 204
Additions (reductions) from provision for credit loss expense	4	(14)	(15)	(34)
Balance	81	170	81	170
Accrued interest receivable excluded from credit losses	49	50	49	50
Unfunded Loan Commitment [Member]
Financing Receivable, Credit Loss, Expense (Reversal)	(1)	(1)	(1)	2
Commercial [Member]
Balance	59	172	79	187
Additions (reductions) from provision for credit loss expense	13	(16)	(7)	(31)
Balance	72	156	72	156
Residential [Member]
Balance	18	12	17	17
Additions (reductions) from provision for credit loss expense	(9)	2	(8)	(3)
Balance	$ 9	$ 14	$ 9	$ 14