Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	$ 120,737
Interest credited	3,443	$ 3,248	$ 2,877
Balance as of end-of-year	126,197	120,737
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	29,141	22,184
Gross deposits	4,756	4,709
Withdrawals	(1,321)	(742)
Policyholder assessments	(1)	(1)
Net transfers from (to) separate account	(477)	(427)
Interest credited	695	548
Change in fair value of embedded derivative instrument and other	2,474	2,870
Balance as of end-of-year	$ 35,267	$ 29,141	22,184
Weighted-average crediting rate	2.10%	2.10%
Net amount at risk	$ 1,962	$ 3,031
Cash surrender value	34,018	27,975
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	25,355	23,365
Gross deposits	4,226	5,130
Withdrawals	(4,828)	(3,929)
Policyholder assessments	(61)	(56)
Net transfers from (to) separate account	0	0
Interest credited	802	643
Change in fair value of embedded derivative instrument and other	469	202
Balance as of end-of-year	$ 25,963	$ 25,355	23,365
Weighted-average crediting rate	3.10%	2.70%
Net amount at risk	$ 240	$ 203
Cash surrender value	24,867	24,349
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	37,180	37,694
Gross deposits	3,619	3,755
Withdrawals	(1,464)	(1,454)
Policyholder assessments	(4,522)	(4,512)
Net transfers from (to) separate account	196	97
Interest credited	1,474	1,479
Change in fair value of embedded derivative instrument and other	116	121
Balance as of end-of-year	$ 36,599	$ 37,180	37,694
Weighted-average crediting rate	4.00%	4.00%
Net amount at risk	$ 297,555	$ 302,712
Cash surrender value	32,999	33,629
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	23,784	25,138
Gross deposits	3,407	2,776
Withdrawals	(4,495)	(4,494)
Policyholder assessments	(14)	(14)
Net transfers from (to) separate account	251	(295)
Interest credited	686	673
Change in fair value of embedded derivative instrument and other	0	0
Balance as of end-of-year	$ 23,619	$ 23,784	$ 25,138
Weighted-average crediting rate	2.90%	2.70%
Net amount at risk	$ 3	$ 4
Cash surrender value	$ 23,586	$ 23,765