Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 119,188,485	$ 114,051,246
Deposits	846,928	700,408
Investment performance	6,174,133	5,753,189
Policy charges	(778,505)	(790,177)
Surrenders and withdrawals	(3,409,965)	(2,318,782)
Benefit payments	(89,013)	(79,876)
Net transfers (to) from separate account	(78,080)	(35,164)
Other	41,040	12,540
Balance, end of period	121,895,023	117,293,384
Cash surrender value	117,516,414	113,015,514
Variable Annuity
Separate Account, Liability [Roll Forward]
Balance, beginning of period	92,383,121	91,785,448
Deposits	149,538	92,053
Investment performance	4,150,157	4,515,993
Policy charges	(557,722)	(589,415)
Surrenders and withdrawals	(3,293,055)	(2,238,332)
Benefit payments	(15,282)	(18,196)
Net transfers (to) from separate account	6,723	(10,253)
Other	877	3,405
Balance, end of period	92,824,357	93,540,703
Cash surrender value	91,713,815	91,951,494
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	26,805,364	22,265,798
Deposits	697,390	608,355
Investment performance	2,023,976	1,237,196
Policy charges	(220,783)	(200,762)
Surrenders and withdrawals	(116,910)	(80,450)
Benefit payments	(73,731)	(61,680)
Net transfers (to) from separate account	(84,803)	(24,911)
Other	40,163	9,135
Balance, end of period	29,070,666	23,752,681
Cash surrender value	$ 25,802,599	$ 21,064,020