Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 119,188,485	$ 114,051,246
Deposits	2,853,199	2,340,828
Investment performance	14,143,500	6,103,228
Policy charges	(2,354,856)	(2,356,117)
Surrenders and withdrawals	(10,499,483)	(7,239,497)
Benefit payments	(253,662)	(215,235)
Net transfers (to) from separate account	(323,706)	(1,119,645)
Other	25,618	46,578
Balance, end of period	122,779,095	111,611,386
Cash surrender value	118,530,072	107,371,809
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	92,383,121	91,785,448
Deposits	423,070	327,045
Investment performance	9,876,434	4,080,782
Policy charges	(1,674,326)	(1,740,555)
Surrenders and withdrawals	(10,135,635)	(6,989,586)
Benefit payments	(49,810)	(57,037)
Net transfers (to) from separate account	(48,394)	(4,467)
Other	5,642	8,355
Balance, end of period	90,780,102	87,409,985
Cash surrender value	89,812,490	86,152,668
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	26,805,364	22,265,798
Deposits	2,430,129	2,013,783
Investment performance	4,267,066	2,022,446
Policy charges	(680,530)	(615,562)
Surrenders and withdrawals	(363,848)	(249,911)
Benefit payments	(203,852)	(158,198)
Net transfers (to) from separate account	(275,312)	(1,115,178)
Other	19,976	38,223
Balance, end of period	31,998,993	24,201,401
Cash surrender value	$ 28,717,582	21,219,141
Policy loan funding to an affiliated irrevocable trust | Variable Life
Separate Account, Liability [Roll Forward]
Net transfers (to) from separate account		$ (900,000)