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			$ 126,197
Interest credited	$ 916	$ 853	1,805	$ 1,675
Balance as of end-of-period	129,209		129,209
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 instrument 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			25,963	25,355
Gross deposits			2,099	2,646
Withdrawals			(1,744)	(2,602)
Policyholder assessments			(30)	(31)
Net transfers from (to) separate account			0	0
Interest credited			438	382
Change in fair value of embedded derivative instrument and other			106	87
Balance as of end-of-period	$ 26,832	$ 25,837	$ 26,832	$ 25,837
Weighted-average crediting rate	3.30%	3.00%	3.30%	3.00%
Net amount at risk	$ 272	$ 221	$ 272	$ 221
Cash surrender value	25,660	24,762	25,660	24,762
UL and Other
Policyholder Account Balance [Roll Forward]
Balance as of beginning-of-year			36,599	37,180
Gross deposits			1,713	1,743
Withdrawals			(818)	(753)
Policyholder assessments			(2,205)	(2,254)
Net transfers from (to) separate account			63	113
Interest credited			715	733
Change in fair value of embedded derivative instrument and other			49	86
Balance as of end-of-period	$ 36,116	$ 36,848	$ 36,116	$ 36,848
Weighted-average crediting rate	3.90%	4.00%	3.90%	4.00%
Net amount at risk	$ 296,496	$ 299,869	$ 296,496	$ 299,869
Cash surrender value	32,446	33,114	32,446	33,114
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 instrument 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