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Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 9 Months Ended
Oct. 22, 2012
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Subsequent Event [Line Items]          
Expected reduction in operating expenses, percent 25.00%        
Reduction in global workforce 20.00%        
Restructuring Charges   $ 0.1 $ 4.3 $ 3.8 $ 6.4
Restructuring Cash Payments 40        
Severance and related   0 2.4 2.8 3.7
Other restructuring charges   0.1 0.8 1.2 1.2
Minimum | Subsequent Event [Member]
         
Subsequent Event [Line Items]          
Asset Impairment Charges 5        
Restructuring Charges 50.0        
Severance and related 15.0        
Other restructuring charges 20.0        
Maximum | Subsequent Event [Member]
         
Subsequent Event [Line Items]          
Asset Impairment Charges 15        
Restructuring Charges 60.0        
Severance and related 25.0        
Other restructuring charges $ 25.0