Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	$ 168,438
Balance as of end-of-period	162,506
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	117,998	$ 113,356
Gross deposits	1,557	904
Withdrawals	(3,915)	(3,208)
Policyholder assessments	(656)	(648)
Change in market performance	(1,798)	7,503
Net transfers from (to) general account	449	269
Balance as of end-of-period	113,635	118,176
Cash surrender value	112,239	116,771
UL and Other
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	28,841	25,150
Gross deposits	353	358
Withdrawals	(204)	(103)
Policyholder assessments	(246)	(246)
Change in market performance	(624)	1,885
Net transfers from (to) general account	(14)	(37)
Balance as of end-of-period	28,106	27,007
Cash surrender value	23,577	24,606
Retirement Plan Services
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	21,541	19,699
Gross deposits	627	570
Withdrawals	(902)	(732)
Policyholder assessments	(46)	(44)
Change in market performance	(478)	1,475
Net transfers from (to) general account	(34)	18
Balance as of end-of-period	20,708	20,986
Cash surrender value	$ 20,695	$ 20,971