Separate Accounts (Separate Account Liabilities) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 118,143,256	$ 119,188,485
Deposits	2,132,291	1,798,133
Investment performance	6,264,093	7,830,032
Policy charges	(1,492,922)	(1,559,623)
Surrenders and withdrawals	(7,035,058)	(6,930,855)
Benefit payments	(208,414)	(165,074)
Net transfers (to) from general account	(230,016)	(210,769)
Other	72,788	30,577
Balance, end of period	117,646,018	119,980,906
Cash surrender value	113,390,218	115,590,957
Variable Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	85,183,055	92,383,121
Deposits	275,971	291,602
Investment performance	4,392,232	5,034,082
Policy charges	(997,613)	(1,112,504)
Surrenders and withdrawals	(6,754,785)	(6,694,864)
Benefit payments	(42,662)	(33,831)
Net transfers (to) from general account	(28,288)	(41,403)
Other	2,688	2,825
Balance, end of period	82,030,598	89,829,028
Cash surrender value	81,263,628	88,793,191
Variable Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	32,960,201	26,805,364
Deposits	1,856,320	1,506,531
Investment performance	1,871,861	2,795,950
Policy charges	(495,309)	(447,119)
Surrenders and withdrawals	(280,273)	(235,991)
Benefit payments	(165,752)	(131,243)
Net transfers (to) from general account	(201,728)	(169,366)
Other	70,100	27,752
Balance, end of period	35,615,420	30,151,878
Cash surrender value	$ 32,126,590	$ 26,797,766