Liability For Future Policy Benefits (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance after transition	$ 18,190,646	$ 19,163,296
Balance, end of period, post flooring	20,869,105	19,991,100
Interest accrual	237,869	203,986
Other Businesses
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance after transition	1,941	2,235
Nonparticipating Traditional And Limited-Pay Business
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Gain in net income	(30,000)	(97,000)
Loss in net income	30,000	99,000
Term Life
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of period	10,911,794	12,485,056
Effect of cumulative changes in discount rate assumptions, beginning of period	554,896	(1,826,120)
Balance at original discount rate, beginning of period	11,466,690	10,658,936
Effect of assumption update			$ (790)	$ 1,295,294
Effect of actual variances from expected experience and other activity			(65,230)	(84,412)
Adjusted balance, beginning of period	11,400,670	11,869,818
Issuances	318,867	187,092
Net premiums / considerations collected	(674,147)	(657,195)
Interest accrual	261,862	257,706
Balance at original discount rate, end of period	11,307,252	11,657,421
Effect of cumulative changes in discount rate assumptions, end of period	(484,287)	22,765
Balance, end of period	10,822,965	11,680,186
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance prior to transition	17,835,251	20,937,097
Effect of cumulative changes in discount rate assumptions, beginning of period	962,034	(3,607,275)
Balance prior to transition	18,797,285	17,329,822
Effect of assumption update			(1,044)	1,756,995
Effect of actual variances from expected experience and other activity			(87,110)	(167,637)
Adjusted balance, beginning of period	18,709,131	18,919,180
Issuances	318,867	187,092
Interest accrual	447,387	436,119
Benefit payments	(716,919)	(738,715)
Other adjustments	1,558	1,781
Balance after transition, at original discount rate	18,760,024	18,805,457
Effect of cumulative changes in discount rate assumptions, end of period	(791,413)	144,406
Balance after transition	17,968,611	18,949,863
Balance, end of period, post flooring	7,145,646	7,269,677
Reinsurance recoverable	6,614,071	6,847,216
Balance after reinsurance recoverable, end of period, post-flooring	531,575	422,461
Term Life | Gross Basis
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Undiscounted expected future gross premiums	21,948,491	22,348,506
Discounted expected future gross premiums (at original discount rate)	15,125,847	15,414,984
Discounted expected future gross premiums (at current discount rate)	14,493,623	15,442,782
Undiscounted expected future benefits and expenses	29,156,389	29,470,523
Interest accrual	185,524	178,413
Gross Premiums	$ 900,634	$ 925,202
Weighted-average duration of the liability in years (at original discount rate)	10 years	11 years
Weighted-average duration of the liability in years (at current discount rate)	10 years	10 years
Weighted-average interest rate (at original discount rate)	5.20%	5.28%
Weighted-average interest rate (at current discount rate)	5.28%	4.63%
Fixed Annuities
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of period	$ 0	$ 0
Effect of cumulative changes in discount rate assumptions, beginning of period	0	0
Balance at original discount rate, beginning of period	0	0
Effect of assumption update			0	0
Effect of actual variances from expected experience and other activity			(1,257)	(78)
Adjusted balance, beginning of period	(1,257)	(78)
Issuances	23,211	17,356
Net premiums / considerations collected	(21,954)	(17,278)
Interest accrual	0	0
Balance at original discount rate, end of period	0	0
Effect of cumulative changes in discount rate assumptions, end of period	0	0
Balance, end of period	0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance prior to transition	204,727	237,065
Effect of cumulative changes in discount rate assumptions, beginning of period	24,876	(16,704)
Balance prior to transition	229,603	220,361
Effect of assumption update			0	0
Effect of actual variances from expected experience and other activity			4,195	351
Adjusted balance, beginning of period	233,798	220,712
Issuances	23,211	17,357
Interest accrual	4,201	3,809
Benefit payments	(14,838)	(13,658)
Other adjustments	(33)	(285)
Balance after transition, at original discount rate	246,339	227,935
Effect of cumulative changes in discount rate assumptions, end of period	(26,245)	(16,737)
Balance after transition	220,094	211,198
Balance, end of period, post flooring	220,094	211,198
Reinsurance recoverable	17,835	16,488
Balance after reinsurance recoverable, end of period, post-flooring	202,259	194,710
Fixed Annuities | Gross Basis
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Undiscounted expected future gross premiums	0	0
Discounted expected future gross premiums (at original discount rate)	0	0
Discounted expected future gross premiums (at current discount rate)	0	0
Undiscounted expected future benefits and expenses	328,414	302,195
Interest accrual	4,201	3,809
Gross Premiums	$ 24,200	$ 19,545
Weighted-average duration of the liability in years (at original discount rate)	7 years	7 years
Weighted-average duration of the liability in years (at current discount rate)	6 years	6 years
Weighted-average interest rate (at original discount rate)	3.57%	3.44%
Weighted-average interest rate (at current discount rate)	5.27%	4.54%
Term Life And Fixed Annuities
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Balance, beginning of period	$ 10,911,794	$ 12,485,056
Effect of cumulative changes in discount rate assumptions, beginning of period	554,896	(1,826,120)
Balance at original discount rate, beginning of period	11,466,690	10,658,936
Effect of assumption update			(790)	1,295,294
Effect of actual variances from expected experience and other activity			(66,487)	(84,490)
Adjusted balance, beginning of period	11,399,413	11,869,740
Issuances	342,078	204,448
Net premiums / considerations collected	(696,101)	(674,473)
Interest accrual	261,862	257,706
Balance at original discount rate, end of period	11,307,252	11,657,421
Effect of cumulative changes in discount rate assumptions, end of period	(484,287)	22,765
Balance, end of period	10,822,965	11,680,186
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance, end of period, post flooring	7,365,740	7,480,875
Reinsurance recoverable	6,631,906	6,863,704
Balance after reinsurance recoverable, end of period, post-flooring	733,834	617,171
Term Life And Fixed Annuities | Total
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance prior to transition	18,039,978	21,174,162
Effect of cumulative changes in discount rate assumptions, beginning of period	986,910	(3,623,979)
Balance prior to transition	19,026,888	17,550,183
Effect of assumption update			(1,044)	1,756,995
Effect of actual variances from expected experience and other activity			$ (82,915)	$ (167,286)
Adjusted balance, beginning of period	18,942,929	19,139,892
Issuances	342,078	204,449
Interest accrual	451,588	439,928
Benefit payments	(731,757)	(752,373)
Other adjustments	1,525	1,496
Balance after transition, at original discount rate	19,006,363	19,033,392
Effect of cumulative changes in discount rate assumptions, end of period	(817,658)	127,669
Balance after transition	$ 18,188,705	$ 19,161,061