Income Taxes (Details 7) (IRS, USD $) In Millions, unless otherwise specified	1 Months Ended
	Jan. 31, 2011 M	Jan. 05, 2011	Oct. 14, 2009
IRS
Tax Examinations
Additional income tax from assessment of tax years 2003 and 2004			$ 24.9
Total assessment from assessment of tax years 2003 and 2004 including interest, withholding tax and utilization of credits			51.9
Income tax benefit from the settlement of the 2003 through 2004 tax examination			17.8
Total assessment from assessment of tax years 2005 and 2006 including interest, withholding tax and utilization of credits		$ 19.6
Reasonably possible period during which resolution could occur (in months)	12