Income Taxes Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Effective Tax Rate	148.40%	6.60%	11.50%	5.60%
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority	$ 9.7		$ 9.7
Change in effective rate as a result of tax court settlement	1.565		0.085