Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			$ 120,737
Interest credited	$ 880	$ 831	2,555	$ 2,424
Balance as of end-of-period	125,968		125,968
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			29,141	22,184
Gross deposits			3,391	3,626
Withdrawals			(726)	(508)
Policyholder assessments			(1)	(1)
Net transfers from (to) separate account			(241)	(311)
Interest credited			506	391
Change in fair value of embedded derivative instrument and other			2,274	1,391
Balance as of end-of-period	$ 34,344	$ 26,772	$ 34,344	$ 26,772
Weighted-average crediting rate	2.10%	2.10%	2.10%	2.10%
Net amount at risk	$ 1,544	$ 6,235	$ 1,544	$ 6,235
Cash surrender value	33,107	25,629	33,107	25,629
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			25,355	23,365
Gross deposits			3,663	2,698
Withdrawals			(3,724)	(2,863)
Policyholder assessments			(45)	(41)
Net transfers from (to) separate account			0	0
Interest credited			593	470
Change in fair value of embedded derivative instrument and other			517	52
Balance as of end-of-period	$ 26,359	$ 23,681	$ 26,359	$ 23,681
Weighted-average crediting rate	3.10%	2.60%	3.10%	2.60%
Net amount at risk	$ 231	$ 188	$ 231	$ 188
Cash surrender value	25,236	22,779	25,236	22,779
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			37,180	37,694
Gross deposits			2,641	2,749
Withdrawals			(1,122)	(1,095)
Policyholder assessments			(3,383)	(3,373)
Net transfers from (to) separate account			143	90
Interest credited			1,109	1,114
Change in fair value of embedded derivative instrument and other			124	38
Balance as of end-of-period	$ 36,692	$ 37,217	$ 36,692	$ 37,217
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 298,334	$ 303,628	$ 298,334	$ 303,628
Cash surrender value	32,982	33,741	32,982	33,741
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			23,784	25,138
Gross deposits			2,580	2,026
Withdrawals			(3,370)	(3,262)
Policyholder assessments			(10)	(10)
Net transfers from (to) separate account			230	(297)
Interest credited			513	504
Change in fair value of embedded derivative instrument and other			0	0
Balance as of end-of-period	$ 23,727	$ 24,099	$ 23,727	$ 24,099
Weighted-average crediting rate	2.90%	2.70%	2.90%	2.70%
Net amount at risk	$ 3	$ 9	$ 3	$ 9
Cash surrender value	$ 23,697	$ 24,094	$ 23,697	$ 24,094