Deferred Policy Acquisition Costs, Deferred Reinsurance, and Deferred Sales Inducements (DAC) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024		Jun. 30, 2025	Jun. 30, 2024
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period				$ 7,807,060	$ 7,144,736
Capitalization				702,317	723,201
Amortization expense	$ (164,114)	$ (150,307)	[1]	(324,337)	(21,150)	[1]
Amortization expense					297,971
Other				18,370	(18,604)
Balance, end of period	8,203,410	7,551,362		8,203,410	7,551,362
Fixed Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period				371,642	197,937
Capitalization				84,024	120,883
Amortization expense				(27,886)
Amortization expense					18,538
Other				(1,235)	0
Balance, end of period	426,545	300,282		426,545	300,282
Variable Annuities
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period				3,373,201	3,298,935
Capitalization				203,730	198,020
Amortization expense				(197,049)
Amortization expense					174,587
Other				16,938	0
Balance, end of period	3,396,820	3,322,368		3,396,820	3,322,368
Term Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period				614,068	743,888
Capitalization				89,752	90,283
Amortization expense				(23,891)
Amortization expense					36,597
Other				(271)	(97)
Balance, end of period	679,658	797,477		679,658	797,477
Variable/Universal Life
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period				3,448,149	2,903,976
Capitalization				324,811	314,015
Amortization expense				(75,511)
Amortization expense					68,249
Other				2,938	(18,507)
Balance, end of period	$ 3,700,387	$ 3,131,235		$ 3,700,387	$ 3,131,235

[1] Amounts reflect revision to prior period Financial Statements. See Note 17 for additional information.