Statutory Information (Summary Of Statutory Net Income And Capital And Surplus) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Statutory Accounting Practices [Line Items]
Total statutory net income				$ 170,863	[1]	$ 508,200	[1]	$ 605,919
Total statutory capital and surplus	$ 2,291,115			2,291,115		2,460,479
After-tax exit and disposal costs	17,156	$ 26,735	$ 41,738	106,389
P&C companies
Statutory Accounting Practices [Line Items]
Total statutory net income				437,422		440,930		457,068
Total statutory capital and surplus	1,137,978			1,137,978		1,396,305
Life and Health companies
Statutory Accounting Practices [Line Items]
Total statutory net income				(266,559)		67,270		$ 148,851
Total statutory capital and surplus	$ 1,153,137			$ 1,153,137		$ 1,064,174

[1] rimarily due to higher loss experience and adverse claims development on 2015 individual major medical policies, a reduction in the 2014 estimated recoveries from the Affordable Care Act risk mitigation programs and $106,389 (after-tax) of exit and disposal costs, including premium deficiency reserves, severance and retention costs, long-lived asset impairments and similar exit and disposal costs related to the decision to exit the health business mentioned above.