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			$ 125,818
Interest credited	$ 887	$ 808	2,559	$ 2,341
Balance as of end-of-period	132,874		132,874
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 instruments 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			25,941	25,330
Gross deposits			3,470	3,663
Withdrawals			(2,405)	(3,721)
Policyholder assessments			(44)	(45)
Net transfers from (to) separate account			0	0
Interest credited			674	592
Change in fair value of embedded derivative instruments and other			218	517
Balance as of end-of-period	$ 27,854	$ 26,336	$ 27,854	$ 26,336
Weighted-average crediting rate	3.40%	3.10%	3.40%	3.10%
Net amount at risk	$ 288	$ 231	$ 288	$ 231
Cash surrender value	26,606	25,214	26,606	25,214
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,242	36,784
Gross deposits			2,554	2,631
Withdrawals			(1,157)	(1,102)
Policyholder assessments			(3,291)	(3,351)
Net transfers from (to) separate account			135	143
Interest credited			1,073	1,098
Change in fair value of embedded derivative instruments and other			122	124
Balance as of end-of-period	$ 35,678	$ 36,327	$ 35,678	$ 36,327
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 290,688	$ 296,736	$ 290,688	$ 296,736
Cash surrender value	31,362	31,969	31,362	31,969
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 instruments 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