Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			$ 120,316
Interest credited	$ 781	$ 804	1,533	$ 1,585
Balance as of end-of-period	123,715		123,715
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			29,141	22,184
Gross deposits			2,102	2,437
Withdrawals			(413)	(328)
Policyholder assessments			(1)	(1)
Net transfers from (to) separate account			(146)	(198)
Interest credited			328	240
derivative instruments			1,842	1,923
Balance as of end-of-period	$ 32,853	$ 26,257	$ 32,853	$ 26,257
Weighted-average crediting rate	2.10%	2.00%	2.10%	2.00%
Net amount at risk	$ 2,135	$ 4,783	$ 2,135	$ 4,783
Cash surrender value	31,650	25,146	31,650	25,146
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			25,330	23,338
Gross deposits			2,646	1,919
Withdrawals			(2,600)	(1,920)
Policyholder assessments			(31)	(28)
Net transfers from (to) separate account			0	0
Interest credited			382	312
derivative instruments			87	165
Balance as of end-of-period	$ 25,814	$ 23,786	$ 25,814	$ 23,786
Weighted-average crediting rate	3.00%	2.60%	3.00%	2.60%
Net amount at risk	$ 221	$ 213	$ 221	$ 213
Cash surrender value	24,738	22,889	24,738	22,889
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,784	37,258
Gross deposits			1,736	1,826
Withdrawals			(739)	(705)
Policyholder assessments			(2,232)	(2,224)
Net transfers from (to) separate account			113	76
Interest credited			726	735
derivative instruments			86	76
Balance as of end-of-period	$ 36,474	$ 37,042	$ 36,474	$ 37,042
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 298,237	$ 301,018	$ 298,237	$ 301,018
Cash surrender value	32,091	32,822	32,091	32,822
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			23,784	25,138
Gross deposits			1,636	1,317
Withdrawals			(2,275)	(2,094)
Policyholder assessments			(7)	(7)
Net transfers from (to) separate account			120	(259)
Interest credited			340	335
derivative instruments			0	0
Balance as of end-of-period	$ 23,598	$ 24,430	$ 23,598	$ 24,430
Weighted-average crediting rate	2.90%	2.70%	2.90%	2.70%
Net amount at risk	$ 3	$ 6	$ 3	$ 6
Cash surrender value	$ 23,570	$ 24,425	$ 23,570	$ 24,425