Reinsurance (Balance Sheet Reinsurance Results) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effects of Reinsurance [Line Items]
Reinsurance recoverables	$ 38,598,767	$ 48,367,096
Policy loans	(1,327,485)	(1,323,681)
Deferred policy acquisition costs	(6,830,972)	(2,433,936)	$ (1,855,698)	$ (1,613,922)
Deferred sales inducements	(374,649)	0
Other assets	1,140,948	417,508
Other liabilities	2,264,477	1,694,492
Impacts of Reinsurance
Effects of Reinsurance [Line Items]
Reinsurance recoverables	38,598,767	48,367,096
Policy loans	(156,749)	(153,869)
Deferred policy acquisition costs	(2,575,232)	(6,574,020)
Deferred sales inducements	(37,905)	(445,493)
Other assets	353,669	233,364
Policyholders’ account balances	12,005,839	4,773,439
Future policy benefits	5,286,252	5,069,353
Other liabilities	1,224,399	1,099,318
Unaffiliated
Effects of Reinsurance [Line Items]
Other assets	0	0
Future policy benefits	0	0
Other liabilities	$ 49,200	$ 42,600