Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 114,051,246	$ 149,797,828
Deposits	2,340,828	2,261,638
Investment performance	6,103,228	(31,638,009)
Policy charges	(2,356,117)	(2,500,519)
Surrenders and withdrawals	(7,239,497)	(6,755,393)
Benefit payments	(215,235)	(288,459)
Net transfers (to) from separate account	(1,119,645)	(371,965)
Other	46,578	39,526
Balance, end of period	111,611,386	110,544,647
Cash surrender value	107,371,809	106,266,036
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	91,785,448	123,977,624
Deposits	327,045	562,208
Investment performance	4,080,782	(26,283,957)
Policy charges	(1,740,555)	(1,929,880)
Surrenders and withdrawals	(6,989,586)	(6,480,743)
Benefit payments	(57,037)	(49,586)
Net transfers (to) from separate account	(4,467)	(201,039)
Other	8,355	9,839
Balance, end of period	87,409,985	89,604,466
Cash surrender value	86,152,668	87,929,884
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	22,265,798	25,820,204
Deposits	2,013,783	1,699,430
Investment performance	2,022,446	(5,354,052)
Policy charges	(615,562)	(570,639)
Surrenders and withdrawals	(249,911)	(274,650)
Benefit payments	(158,198)	(238,873)
Net transfers (to) from separate account	(1,115,178)	(170,926)
Other	38,223	29,687
Balance, end of period	24,201,401	20,940,181
Cash surrender value	21,219,141	$ 18,336,152
Policy loan funding to an affiliated irrevocable trust | Variable Life
Separate Account, Liability [Roll Forward]
Net transfers (to) from separate account	$ (900,000)