Separate Accounts (Summary Of Balances And changes In Separate Account Liabilities) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	$ 143,536
Balance as of end-of-year	145,810	$ 143,536
Variable Annuities [Member]
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	105,573	136,665
Gross deposits	2,137	3,371
Withdrawals	(7,402)	(9,238)
Policyholder assessments	(1,883)	(2,603)
Change in market performance	6,320	(23,194)
Net transfer from (to) general account	447	572
Balance as of end-of-year	105,192	105,573
Cash surrender value	103,729	103,987
Retirement Plan Services [Member]
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	16,996	21,068
Gross deposits	1,576	2,378
Withdrawals	(1,795)	(2,378)
Policyholder assessments	(121)	(164)
Change in market performance	1,316	(3,710)
Net transfer from (to) general account	(44)	(198)
Balance as of end-of-year	17,928	16,996
Cash surrender value	17,914	16,982
UL and Other [Member]
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	20,920	24,785
Gross deposits	1,178	1,900
Withdrawals	(227)	(454)
Policyholder assessments	(714)	(938)
Change in market performance	1,573	(4,371)
Net transfer from (to) general account	(88)	(2)
Balance as of end-of-year	22,642	20,920
Cash surrender value	$ 20,324	$ 18,666