Separate Accounts - Schedule of Reconciliation of Separate Account Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	$ 158,257
Balance as of end-of-year	168,438	$ 158,257
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	113,356	105,573
Gross deposits	4,765	2,982
Withdrawals	(14,074)	(10,177)
Policyholder assessments	(2,639)	(2,510)
Change in market performance	15,548	16,870
Net transfers from (to) general account	1,042	618
Balance as of end-of-year	117,998	113,356
Cash surrender value	116,612	111,928
UL and Other
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	25,150	20,920
Gross deposits	1,483	1,630
Withdrawals	(477)	(313)
Policyholder assessments	(995)	(964)
Change in market performance	3,876	3,973
Net transfers from (to) general account	(196)	(96)
Balance as of end-of-year	28,841	25,150
Cash surrender value	26,435	22,760
Retirement Plan Services
Separate Account, Liability [Roll Forward]
Balance as of beginning-of-year	19,699	16,996
Gross deposits	2,302	2,222
Withdrawals	(3,378)	(2,527)
Policyholder assessments	(182)	(163)
Change in market performance	3,072	3,221
Net transfers from (to) general account	28	(50)
Balance as of end-of-year	21,541	19,699
Cash surrender value	$ 21,526	$ 19,684