Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2009 Foreign Country [Member]	Mar. 31, 2013 Maximum [Member]
Income Tax Contingency [Line Items]
Income tax (benefit) provision	$ (14.1)	$ 7.0
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Effective tax rate	(18.30%)	30.10%
Tax Adjustments, Settlements, and Unusual Provisions	43.0
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	27.8
Income Tax Examination, Interest Expense	3.0
Income Tax Reconciliation, Tax Credits, Research	15.2
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate		35.00%
Unrecognized Tax Benefits, Period Increase (Decrease)	29.1
Unrecognized Tax Benefits	111.2
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	98.2
Greater than remote likelihood decrease in gross unrecognized tax benefits within next 12 months				11.1
Interest and penalties recorded			$ 4.6