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			$ 120,316
Interest credited	$ 808	$ 827	2,341	$ 2,412
Balance as of end-of-period	125,579		125,579
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 instruments 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			25,330	23,338
Gross deposits			3,663	2,698
Withdrawals			(3,721)	(2,861)
Policyholder assessments			(45)	(41)
Net transfers from (to) separate account			0	0
Interest credited			592	469
Change in fair value of embedded derivative instruments and other			517	52
Balance as of end-of-period	$ 26,336	$ 23,655	$ 26,336	$ 23,655
Weighted-average crediting rate	3.10%	2.60%	3.10%	2.60%
Net amount at risk	$ 231	$ 188	$ 231	$ 188
Cash surrender value	25,214	22,753	25,214	22,753
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,784	37,258
Gross deposits			2,631	2,737
Withdrawals			(1,102)	(1,077)
Policyholder assessments			(3,351)	(3,337)
Net transfers from (to) separate account			143	90
Interest credited			1,098	1,101
Change in fair value of embedded derivative instruments and other			124	38
Balance as of end-of-period	$ 36,327	$ 36,810	$ 36,327	$ 36,810
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 296,736	$ 301,876	$ 296,736	$ 301,876
Cash surrender value	31,969	32,685	31,969	32,685
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 instruments 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