Policyholder Account Balances - Summary of Balances and Changes in Policyholder Account Balances (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			$ 125,818
Interest credited	$ 849	$ 781	1,672	$ 1,533
Balance as of end-of-period	128,849		128,849
Variable Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			35,267	29,141
Gross deposits			2,893	2,102
Withdrawals			(1,234)	(413)
Policyholder assessments			(1)	(1)
Net transfers from (to) separate account			(619)	(146)
Interest credited			403	328
Change in fair value of embedded derivative instruments and other			317	1,842
Balance as of end-of-period	$ 37,026	$ 32,853	$ 37,026	$ 32,853
Weighted-average crediting rate	2.30%	2.10%	2.30%	2.10%
Net amount at risk	$ 1,689	$ 2,135	$ 1,689	$ 2,135
Cash surrender value	35,740	31,650	35,740	31,650
Fixed Annuities
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			25,941	25,330
Gross deposits			2,099	2,646
Withdrawals			(1,741)	(2,600)
Policyholder assessments			(30)	(31)
Net transfers from (to) separate account			0	0
Interest credited			437	382
Change in fair value of embedded derivative instruments and other			106	87
Balance as of end-of-period	$ 26,812	$ 25,814	$ 26,812	$ 25,814
Weighted-average crediting rate	3.30%	3.00%	3.30%	3.00%
Net amount at risk	$ 272	$ 221	$ 272	$ 221
Cash surrender value	25,640	24,738	25,640	24,738
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,242	36,784
Gross deposits			1,706	1,736
Withdrawals			(806)	(739)
Policyholder assessments			(2,186)	(2,232)
Net transfers from (to) separate account			63	113
Interest credited			708	726
Change in fair value of embedded derivative instruments and other			49	86
Balance as of end-of-period	$ 35,776	$ 36,474	$ 35,776	$ 36,474
Weighted-average crediting rate	3.90%	4.00%	3.90%	4.00%
Net amount at risk	$ 294,997	$ 298,237	$ 294,997	$ 298,237
Cash surrender value	31,460	32,091	31,460	32,091
Retirement Plan Services
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			23,619	23,784
Gross deposits			1,921	1,636
Withdrawals			(2,433)	(2,275)
Policyholder assessments			(8)	(7)
Net transfers from (to) separate account			254	120
Interest credited			347	340
Change in fair value of embedded derivative instruments and other			0	0
Balance as of end-of-period	$ 23,700	$ 23,598	$ 23,700	$ 23,598
Weighted-average crediting rate	3.00%	2.90%	3.00%	2.90%
Net amount at risk	$ 2	$ 3	$ 2	$ 3
Cash surrender value	$ 23,667	$ 23,570	$ 23,667	$ 23,570