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	$ 125,818
Interest credited	823	$ 752
Balance as of end-of-period	124,892
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 instruments 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	25,941	25,330
Gross deposits	873	972
Withdrawals	(946)	(1,409)
Policyholder assessments	(15)	(17)
Net transfers from (to) separate account	0	0
Interest credited	210	183
Change in fair value of embedded derivative instruments and other	(45)	78
Balance as of end-of-period	$ 26,018	$ 25,137
Weighted-average crediting rate	3.20%	2.90%
Net amount at risk	$ 255	$ 210
Cash surrender value	24,914	24,114
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	36,242	36,784
Gross deposits	862	847
Withdrawals	(440)	(356)
Policyholder assessments	(1,094)	(1,112)
Net transfers from (to) separate account	14	38
Interest credited	352	360
Change in fair value of embedded derivative instruments and other	(65)	61
Balance as of end-of-period	$ 35,871	$ 36,622
Weighted-average crediting rate	3.90%	3.90%
Net amount at risk	$ 297,567	$ 299,063
Cash surrender value	31,648	32,282
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 instruments 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