Business and Basic Presentation (Summary Of Adoption Of New Guidance On Unaudited Interim Consolidated Statement of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended							9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022		Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)	$ (444,327)	$ 217,598	$ 279,679	$ 20,147		$ (547,018)	$ (482,207)	$ 52,950	$ (1,009,078)	[1]
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Policy charges and fee income								47,830	89,744	[1]
Interest credited to policyholders’ account balances								467,112	318,586	[1]
Realized investment (gains) losses, net	468,256			(97,271)	[2]			581,241	(810,771)	[1]
Change in value of market risk benefits, net of related hedging (gains) losses	$ 247,471			80,078	[2]			266,156	1,235,415	[1]
Change in:
Future policy benefits and other insurance liabilities								1,722,582	3,283,649	[1]
Reinsurance recoverables								(447,411)	(1,936,549)	[1]
Deferred policy acquisition costs								(386,514)	(336,285)	[1]
Income taxes								(430,883)	(446,118)	[1]
Other, net								107,768	1,717,442	[1],[3]
Cash flows from (used in) operating activities								$ 1,337,477	1,023,461
As Previously Reported
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)				78,711					408,962
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Policy charges and fee income									(70,540)
Interest credited to policyholders’ account balances									391,640
Realized investment (gains) losses, net				(23,958)					(1,522,774)
Change in value of market risk benefits, net of related hedging (gains) losses				0					0
Change in:
Future policy benefits and other insurance liabilities									2,021,063
Reinsurance recoverables									(875,612)
Deferred policy acquisition costs									11,130
Income taxes									(26,802)
Other, net									1,768,968
Cash flows from (used in) operating activities									1,023,461
Change of Effect
CASH FLOWS FROM OPERATING ACTIVITIES:
NET INCOME (LOSS)				(58,564)					(1,418,040)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Policy charges and fee income									160,284
Interest credited to policyholders’ account balances									(73,054)
Realized investment (gains) losses, net				(73,313)					712,003
Change in value of market risk benefits, net of related hedging (gains) losses				$ 80,078					1,235,415
Change in:
Future policy benefits and other insurance liabilities									1,262,586
Reinsurance recoverables									(1,060,937)
Deferred policy acquisition costs									(347,415)
Income taxes									(419,316)
Other, net									(51,526)
Cash flows from (used in) operating activities									$ 0

[1] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

[2] Prior period amounts adjusted for the implementation of ASU 2018-12: Targeted Improvements to the Accounting for Long-Duration Contracts.

[3] Prior period has been reclassified to conform to the current period presentation.