Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 119,188,485	$ 114,051,246
Deposits	1,798,133	1,577,513
Investment performance	7,830,032	9,719,802
Policy charges	(1,559,623)	(1,576,563)
Surrenders and withdrawals	(6,930,855)	(4,776,319)
Benefit payments	(165,074)	(150,697)
Net transfers (to) from separate account	(210,769)	(1,040,549)
Other	30,577	35,722
Balance, end of period	119,980,906	117,840,155
Cash surrender value	115,590,957	113,562,296
Variable Annuity
Separate Account, Liability [Roll Forward]
Balance, beginning of period	92,383,121	91,785,448
Deposits	291,602	200,961
Investment performance	5,034,082	7,184,460
Policy charges	(1,112,504)	(1,171,455)
Surrenders and withdrawals	(6,694,864)	(4,561,633)
Benefit payments	(33,831)	(43,056)
Net transfers (to) from separate account	(41,403)	(4,995)
Other	2,825	5,405
Balance, end of period	89,829,028	93,395,135
Cash surrender value	88,793,191	92,036,034
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	26,805,364	22,265,798
Deposits	1,506,531	1,376,552
Investment performance	2,795,950	2,535,342
Policy charges	(447,119)	(405,108)
Surrenders and withdrawals	(235,991)	(214,686)
Benefit payments	(131,243)	(107,641)
Net transfers (to) from separate account	(169,366)	(1,035,554)
Other	27,752	30,317
Balance, end of period	30,151,878	24,445,020
Cash surrender value	$ 26,797,766	21,526,262
Policy loan funding to an affiliated irrevocable trust | Variable Life
Separate Account, Liability [Roll Forward]
Net transfers (to) from separate account		$ 900,000