Reinsurance (Reinsurance amounts included in the Statements of Financial Position) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Effects of Reinsurance [Line Items]
Reinsurance recoverables	$ 35,398,214	$ 38,598,767
Policy loans	(499,612)	(1,327,485)
Deferred policy acquisition costs	6,524,761	6,830,972
Deferred sales inducements	(283,104)	(374,649)
Other assets	1,095,617	1,140,948
Future policy benefits	22,963,655	27,927,029
Other liabilities	3,310,087	2,264,477
Impacts of Reinsurance
Effects of Reinsurance [Line Items]
Reinsurance recoverables	35,398,214	38,598,767
Policy loans	(1,012,193)	(156,749)
Deferred policy acquisition costs	3,212,823	2,575,232
Deferred sales inducements	(34,396)	(37,905)
Other assets	967,288	850,681
Policyholders' account balance	9,044,315	14,386,443
Future policy benefits	4,922,733	5,286,252
Other liabilities	2,671,666	1,642,413
Unaffiliated activity
Effects of Reinsurance [Line Items]
Deferred policy acquisition costs	484,567	0
Other assets	855,948	497,050
Policyholders' account balance	4,645,231	0
Future policy benefits	0	9
Other liabilities	$ 685,076	$ 467,203