Future Policy Benefit Reserves (Schedule Of Liability For Future Policy Benefits, Interest Assumptions On Individual Health Insurance) (Details)	12 Months Ended
	Dec. 31, 2011
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, percentage of liability	100.00%
Average interest rate of liability for future life and health insurance benefits	5.90%
Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, percentage of liability	100.00%
2.5% to 5.75% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, low end	2.50%
Liability for future policy benefits, interest rate assumptions, high end	5.75%
Liability for future policy benefits, interest rate assumptions, percentage of liability	2.00%
6.0% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions	6.00%
Liability for future policy benefits, interest rate assumptions, percentage of liability	60.00%
7.0% Graded To 6.0% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, low end	6.00%
Liability for future policy benefits, interest rate assumptions, high end	7.00%
Liability for future policy benefits, interest rate assumptions, percentage of liability	26.00%
8.0% Graded To 6.0% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, low end	6.00%
Liability for future policy benefits, interest rate assumptions, high end	8.00%
Liability for future policy benefits, interest rate assumptions, percentage of liability	6.00%
8.5% Graded To 6.0% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions, low end	6.00%
Liability for future policy benefits, interest rate assumptions, high end	8.50%
Liability for future policy benefits, interest rate assumptions, percentage of liability	1.00%
6.75% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions	6.75%
Liability for future policy benefits, interest rate assumptions, percentage of liability	1.00%
7.0% [Member] | Health Insurance [Member]
Liability for Future Policy Benefit [Line Items]
Liability for future policy benefits, interest rate assumptions	7.00%
Liability for future policy benefits, interest rate assumptions, percentage of liability	4.00%