Liability For Future Policy Benefits (Additional Insurance Reserves) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Additional Liability, Long-Duration Insurance [Line Items]
Balance after reinsurance recoverables, including amounts in AOCI, end of period	$ 292,503	$ 187,227
Other Businesses
Additional Liability, Long-Duration Insurance [Line Items]
Balance after reinsurance recoverables, including amounts in AOCI, end of period	6,389	0
Variable/Universal Life
Additional Liability, Long-Duration Insurance [Line Items]
Balance, including amounts in AOCI, post-flooring	16,351,053	14,280,793
Flooring impact and amounts in AOCI	617,186	831,583
Balance, excluding amounts in AOCI, beginning of period, pre-flooring	16,968,239	15,112,376
Effect of assumption update			$ (41,977)	$ 154,058
Effect of actual variances from expected experience and other activity			107,488	161,320
Adjusted balance, beginning of period			17,033,750	15,427,754
Assessments collected	511,560	586,734
Interest accrual	289,723	261,019
Benefits paid	(195,454)	(158,757)
Balance, excluding amounts in AOCI, end of period, pre-flooring	17,639,579	16,116,750
Flooring impact and amounts in AOCI	(500,285)	(1,642,621)
Balance, including amounts in AOCI, end of period, post-flooring	17,139,294	14,474,129
Less: Reinsurance recoverables	16,922,548	14,286,902
Balance after reinsurance recoverables, including amounts in AOCI, end of period	$ 216,746	$ 187,227
Weighted-average duration of the liability in years (at original discount rate)	21 years	22 years
Weighted-average interest rate (at original discount rate)	3.37%	3.40%
Fixed Annuities
Additional Liability, Long-Duration Insurance [Line Items]
Balance, including amounts in AOCI, post-flooring	$ 0	$ 0
Flooring impact and amounts in AOCI	0	0
Balance, excluding amounts in AOCI, beginning of period, pre-flooring	0	0
Effect of assumption update			0	0
Effect of actual variances from expected experience and other activity			59,462	0
Adjusted balance, beginning of period			59,462	0
Assessments collected	22,346	0
Interest accrual	618	0
Benefits paid	0	0
Balance, excluding amounts in AOCI, end of period, pre-flooring	82,426	0
Flooring impact and amounts in AOCI	(13,058)	0
Balance, including amounts in AOCI, end of period, post-flooring	69,368	0
Less: Reinsurance recoverables	0	0
Balance after reinsurance recoverables, including amounts in AOCI, end of period	$ 69,368	0
Weighted-average duration of the liability in years (at original discount rate)	22 years
Weighted-average interest rate (at original discount rate)	2.68%
Term Life And Fixed Annuities | Total
Additional Liability, Long-Duration Insurance [Line Items]
Balance, including amounts in AOCI, post-flooring	$ 16,351,053	14,280,793
Flooring impact and amounts in AOCI	617,186	831,583
Balance, excluding amounts in AOCI, beginning of period, pre-flooring	16,968,239	15,112,376
Effect of assumption update			(41,977)	154,058
Effect of actual variances from expected experience and other activity			166,950	161,320
Adjusted balance, beginning of period			$ 17,093,212	$ 15,427,754
Assessments collected	533,906	586,734
Interest accrual	290,341	261,019
Benefits paid	(195,454)	(158,757)
Balance, excluding amounts in AOCI, end of period, pre-flooring	17,722,005	16,116,750
Flooring impact and amounts in AOCI	(513,343)	(1,642,621)
Balance, including amounts in AOCI, end of period, post-flooring	17,208,662	14,474,129
Less: Reinsurance recoverables	16,922,548	14,286,902
Balance after reinsurance recoverables, including amounts in AOCI, end of period	$ 286,114	$ 187,227