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, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Balance as of beginning-of-year	$ 103	$ 77	$ 99	$ 96
Additions (reductions) from provision for credit loss expense	2	4	6	(15)
Balance as of end-of-year	105	81	105	81
Accrued interest receivable excluded from credit losses	53	49	53	49
Unfunded Loan Commitment [Member]
Financing Receivable, Credit Loss, Expense (Reversal)	(1)		(1)	(1)
Commercial [Member]
Balance as of beginning-of-year	83	59	84	79
Additions (reductions) from provision for credit loss expense	(1)	13	(2)	(7)
Balance as of end-of-year	82	72	82	72
Residential [Member]
Balance as of beginning-of-year	20	18	15	17
Additions (reductions) from provision for credit loss expense	3	(9)	8	(8)
Balance as of end-of-year	$ 23	9	$ 23	$ 9
Maximum [Member] | Unfunded Loan Commitment [Member]
Financing Receivable, Credit Loss, Expense (Reversal)		$ (1)