Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	$ 136,245
Interest credited	999	$ 890
Balance as of end-of-period	135,683
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	40,060	35,267
Gross deposits	1,869	1,369
Withdrawals	(920)	(612)
Policyholder assessments	(1)	0
Net transfers from (to) separate account	(651)	(287)
Interest credited	230	199
Change in fair value of embedded derivative instrument and other	(1,444)	(1,566)
Balance as of end-of-period	$ 39,143	$ 34,370
Weighted-average crediting rate	2.30%	2.30%
Net amount at risk	$ 2,652	$ 2,518
Cash surrender value	37,757	33,108
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	28,728	25,963
Gross deposits	718	873
Withdrawals	(616)	(947)
Policyholder assessments	(15)	(15)
Net transfers from (to) separate account	0	0
Interest credited	256	210
Change in fair value of embedded derivative instrument and other	(97)	(45)
Balance as of end-of-period	$ 28,974	$ 26,039
Weighted-average crediting rate	3.60%	3.20%
Net amount at risk	$ 425	$ 255
Cash surrender value	27,669	24,935
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	35,986	36,599
Gross deposits	837	865
Withdrawals	(403)	(445)
Policyholder assessments	(1,095)	(1,104)
Net transfers from (to) separate account	68	14
Interest credited	357	356
Change in fair value of embedded derivative instrument and other	(27)	(65)
Balance as of end-of-period	$ 35,723	$ 36,220
Weighted-average crediting rate	4.00%	3.90%
Net amount at risk	$ 292,048	$ 299,107
Cash surrender value	32,385	32,645
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year	23,843	23,619
Gross deposits	880	811
Withdrawals	(1,279)	(1,330)
Policyholder assessments	(5)	(4)
Net transfers from (to) separate account	86	211
Interest credited	169	172
Change in fair value of embedded derivative instrument and other	0	0
Balance as of end-of-period	$ 23,694	$ 23,479
Weighted-average crediting rate	2.80%	2.90%
Net amount at risk	$ 3	$ 4
Cash surrender value	$ 23,657	$ 23,443