Net Investment Gains (Losses) (Change in Unrealized Gains (Losses) of Available For Sales Securities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Realized and Unrealized Investment Gains Losses [Line Items]
Total change in unrealized investment losses	$ (394,832)	$ (45,270)	$ (1,365,064)	$ (130,201)
Income tax benefit	79,168	9,674	288,847	27,747
Noncontrolling interests	0	0	(1)	(1)
Total change in unrealized gains	(315,664)	(35,596)	(1,076,218)	(102,455)
Debt securities
Realized and Unrealized Investment Gains Losses [Line Items]
Total change in unrealized investment losses	(385,503)	(41,041)	(1,335,413)	(135,099)
Fixed maturity securities with allowance for expected credit losses
Realized and Unrealized Investment Gains Losses [Line Items]
Total change in unrealized investment losses	(4,005)	111	(20,590)	10,397
Investment funds
Realized and Unrealized Investment Gains Losses [Line Items]
Total change in unrealized investment losses	(5,031)	(4,098)	(7,863)	(4,355)
Other
Realized and Unrealized Investment Gains Losses [Line Items]
Total change in unrealized investment losses	$ (293)	$ (242)	$ (1,198)	$ (1,144)