Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Effective tax rate	(22.30%)	35.60%	6.90%	37.30%
Impact to Effective Income Tax Rate, Nondeductible Health Insurer Fee, Percent	13.70%		14.00%
Tax Benefit Due to Worthless Stock loss	$ 72.6
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	$ 11.0