Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	$ 143,536
Balance as of end-of-year	158,257	$ 143,536
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	105,573	136,665
Gross deposits	2,982	3,371
Withdrawals	(10,177)	(9,238)
Policyholder assessments	(2,510)	(2,603)
Change in market performance	16,870	(23,194)
Net transfers from (to) general account	618	572
Balance as of end-of-year	113,356	105,573
Cash surrender value	111,928	103,987
UL and Other
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	20,920	24,785
Gross deposits	1,630	1,900
Withdrawals	(313)	(454)
Policyholder assessments	(964)	(938)
Change in market performance	3,973	(4,371)
Net transfers from (to) general account	(96)	(2)
Balance as of end-of-year	25,150	20,920
Cash surrender value	22,760	18,666
Retirement Plan Services
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	16,996	21,068
Gross deposits	2,222	2,378
Withdrawals	(2,527)	(2,378)
Policyholder assessments	(163)	(164)
Change in market performance	3,221	(3,710)
Net transfers from (to) general account	(50)	(198)
Balance as of end-of-year	19,699	16,996
Cash surrender value	$ 19,684	$ 16,982