Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	$ 126,197
Interest credited	890	$ 822
Balance as of end-of-period	125,262
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	35,267	29,141
Gross deposits	1,369	973
Withdrawals	(612)	(224)
Policyholder assessments	0	0
Net transfers from (to) separate account	(287)	(178)
Interest credited	199	158
Change in fair value of embedded derivative instrument and other	(1,566)	1,538
Balance as of end-of-period	$ 34,370	$ 31,408
Weighted-average crediting rate	2.30%	2.10%
Net amount at risk	$ 2,518	$ 2,056
Cash surrender value	33,108	30,228
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	25,963	25,355
Gross deposits	873	973
Withdrawals	(947)	(1,410)
Policyholder assessments	(15)	(17)
Net transfers from (to) separate account	0	0
Interest credited	210	183
Change in fair value of embedded derivative instrument and other	(45)	78
Balance as of end-of-period	$ 26,039	$ 25,162
Weighted-average crediting rate	3.20%	2.90%
Net amount at risk	$ 255	$ 210
Cash surrender value	24,935	24,139
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	36,599	37,180
Gross deposits	865	850
Withdrawals	(445)	(364)
Policyholder assessments	(1,104)	(1,124)
Net transfers from (to) separate account	14	38
Interest credited	356	365
Change in fair value of embedded derivative instrument and other	(65)	61
Balance as of end-of-period	$ 36,220	$ 37,006
Weighted-average crediting rate	3.90%	3.90%
Net amount at risk	$ 299,107	$ 300,740
Cash surrender value	32,645	33,314
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	23,619	23,784
Gross deposits	811	790
Withdrawals	(1,330)	(1,203)
Policyholder assessments	(4)	(3)
Net transfers from (to) separate account	211	50
Interest credited	172	168
Change in fair value of embedded derivative instrument and other	0	0
Balance as of end-of-period	$ 23,479	$ 23,586
Weighted-average crediting rate	2.90%	2.80%
Net amount at risk	$ 4	$ 3
Cash surrender value	$ 23,443	$ 23,560