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			$ 120,737
Interest credited	$ 853	$ 808	1,675	$ 1,593
Balance as of end-of-period	124,113		124,113
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
Change in fair value of embedded derivative instrument			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			25,355	23,365
Gross deposits			2,646	1,919
Withdrawals			(2,602)	(1,920)
Policyholder assessments			(31)	(28)
Net transfers from (to) separate account			0	0
Interest credited			382	312
Change in fair value of embedded derivative instrument			87	165
Balance as of end-of-period	$ 25,837	$ 23,813	$ 25,837	$ 23,813
Weighted-average crediting rate	3.00%	2.60%	3.00%	2.60%
Net amount at risk	$ 221	$ 213	$ 221	$ 213
Cash surrender value	24,762	22,915	24,762	22,915
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			37,180	37,694
Gross deposits			1,743	1,834
Withdrawals			(753)	(717)
Policyholder assessments			(2,254)	(2,248)
Net transfers from (to) separate account			113	75
Interest credited			733	744
Change in fair value of embedded derivative instrument			86	76
Balance as of end-of-period	$ 36,848	$ 37,458	$ 36,848	$ 37,458
Weighted-average crediting rate	4.00%	4.00%	4.00%	4.00%
Net amount at risk	$ 299,869	$ 302,804	$ 299,869	$ 302,804
Cash surrender value	33,114	33,886	33,114	33,886
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
Change in fair value of embedded derivative instrument			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