Separate Accounts (Summary of Balances and changes in Separate Account Liabilities) (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 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	153,246	$ 143,536
UL and Other [Member]
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	20,920	24,785
Gross Deposits	821	1,900
Withdrawals	(154)	(454)
Policyholder assessments	(476)	(938)
Change in market performance	2,374	(4,371)
Net transfer from (to) general account	(76)	(2)
Balance as of end-of-year	23,409	20,920
Cash surrender value	21,080	18,666
Variable Annuities [Member]
Fair Value, Separate Account Investment [Line Items]
Balance as of beginning-of-year	105,573	136,665
Gross Deposits	1,367	3,371
Withdrawals	(4,915)	(9,238)
Policyholder assessments	(1,251)	(2,603)
Change in market performance	9,950	(23,194)
Net transfer from (to) general account	274	572
Balance as of end-of-year	110,998	105,573
Cash surrender value	109,501	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	1,078	2,378
Withdrawals	(1,123)	(2,378)
Policyholder assessments	(79)	(164)
Change in market performance	1,953	(3,710)
Net transfer from (to) general account	(36)	(198)
Balance as of end-of-year	18,789	16,996
Cash surrender value	$ 18,774	$ 16,982