Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			$ 126,197
Interest credited	$ 954	$ 880	2,759	$ 2,555
Balance as of end-of-period	133,223		133,223
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			35,267	29,141
Gross deposits			4,431	3,391
Withdrawals			(1,917)	(726)
Policyholder assessments			(2)	(1)
Net transfers from (to) separate account			(1,050)	(241)
Interest credited			615	506
Change in fair value of embedded derivative instrument and other			1,821	2,274
Balance as of end-of-period	$ 39,165	$ 34,344	$ 39,165	$ 34,344
Weighted-average crediting rate	2.30%	2.10%	2.30%	2.10%
Net amount at risk	$ 1,442	$ 1,544	$ 1,442	$ 1,544
Cash surrender value	37,857	33,107	37,857	33,107
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			25,963	25,355
Gross deposits			3,470	3,663
Withdrawals			(2,408)	(3,724)
Policyholder assessments			(44)	(45)
Net transfers from (to) separate account			0	0
Interest credited			675	593
Change in fair value of embedded derivative instrument and other			218	517
Balance as of end-of-period	$ 27,874	$ 26,359	$ 27,874	$ 26,359
Weighted-average crediting rate	3.40%	3.10%	3.40%	3.10%
Net amount at risk	$ 288	$ 231	$ 288	$ 231
Cash surrender value	26,625	25,236	26,625	25,236
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,599	37,180
Gross deposits			2,564	2,641
Withdrawals			(1,174)	(1,122)
Policyholder assessments			(3,320)	(3,383)
Net transfers from (to) separate account			134	143
Interest credited			1,083	1,109
Change in fair value of embedded derivative instrument and other			122	124
Balance as of end-of-period	$ 36,008	$ 36,692	$ 36,008	$ 36,692
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 292,154	$ 298,334	$ 292,154	$ 298,334
Cash surrender value	32,341	32,982	32,341	32,982
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			23,619	23,784
Gross deposits			3,011	2,580
Withdrawals			(3,720)	(3,370)
Policyholder assessments			(13)	(10)
Net transfers from (to) separate account			426	230
Interest credited			529	513
Change in fair value of embedded derivative instrument and other			0	0
Balance as of end-of-period	$ 23,852	$ 23,727	$ 23,852	$ 23,727
Weighted-average crediting rate	3.00%	2.90%	3.00%	2.90%
Net amount at risk	$ 2	$ 3	$ 2	$ 3
Cash surrender value	$ 23,815	$ 23,697	$ 23,815	$ 23,697