Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	$ 158,257
Balance as of end-of-period	166,225
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	113,356	$ 105,573
Gross deposits	904	624
Withdrawals	(3,208)	(2,436)
Policyholder assessments	(648)	(624)
Change in market performance	7,503	5,054
Net transfers from (to) general account	269	143
Balance as of end-of-period	118,176	108,334
Cash surrender value	116,771	106,796
UL and Other
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	25,150	20,920
Gross deposits	358	394
Withdrawals	(103)	(75)
Policyholder assessments	(246)	(238)
Change in market performance	1,885	1,193
Net transfers from (to) general account	(37)	(32)
Balance as of end-of-period	27,007	22,162
Cash surrender value	24,606	19,863
Retirement Plan Services
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	19,699	16,996
Gross deposits	570	554
Withdrawals	(732)	(586)
Policyholder assessments	(44)	(40)
Change in market performance	1,475	978
Net transfers from (to) general account	18	(26)
Balance as of end-of-period	20,986	17,876
Cash surrender value	$ 20,971	$ 17,862