Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	$ 168,438
Balance as of end-of-period	179,860
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	117,998	$ 113,356
Gross deposits	4,392	3,002
Withdrawals	(11,949)	(10,190)
Policyholder assessments	(1,972)	(1,970)
Change in market performance	13,445	15,664
Net transfers from (to) general account	1,514	608
Balance as of end-of-period	123,428	120,470
Cash surrender value	122,028	119,106
UL and Other
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	28,841	25,150
Gross deposits	2,183	1,058
Withdrawals	(712)	(347)
Policyholder assessments	(745)	(742)
Change in market performance	3,819	3,945
Net transfers from (to) general account	(134)	(143)
Balance as of end-of-period	33,252	28,921
Cash surrender value	30,837	26,498
Retirement Plan Services
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	21,541	19,699
Gross deposits	1,755	1,751
Withdrawals	(2,730)	(2,382)
Policyholder assessments	(138)	(134)
Change in market performance	2,751	3,065
Net transfers from (to) general account	(60)	34
Balance as of end-of-period	23,119	22,033
Cash surrender value	$ 23,105	$ 22,018