Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 118,143,256	$ 119,188,485
Deposits	3,303,291	2,853,199
Investment performance	12,113,776	14,143,500
Policy charges	(2,241,752)	(2,354,856)
Surrenders and withdrawals	(10,847,512)	(10,499,483)
Benefit payments	(343,085)	(253,662)
Net transfers (to) from general account	(341,592)	(323,706)
Other	118,757	25,618
Balance, end of period	119,905,139	122,779,095
Cash surrender value	115,614,785	118,530,072
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	85,183,055	92,383,121
Deposits	419,214	423,070
Investment performance	8,197,009	9,876,434
Policy charges	(1,491,030)	(1,674,326)
Surrenders and withdrawals	(10,396,366)	(10,135,635)
Benefit payments	(62,086)	(49,810)
Net transfers (to) from general account	(8,997)	(48,394)
Other	4,775	5,642
Balance, end of period	81,845,574	90,780,102
Cash surrender value	81,151,328	89,812,490
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	32,960,201	26,805,364
Deposits	2,884,077	2,430,129
Investment performance	3,916,767	4,267,066
Policy charges	(750,722)	(680,530)
Surrenders and withdrawals	(451,146)	(363,848)
Benefit payments	(280,999)	(203,852)
Net transfers (to) from general account	(332,595)	(275,312)
Other	113,982	19,976
Balance, end of period	38,059,565	31,998,993
Cash surrender value	$ 34,463,457	$ 28,717,582