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Stock Compensation Plans (Schedule of Employee Service Share-based Compensation, Allocation of Recognized Costs) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense $ 5.0 $ 5.6 $ 7.4 $ 12.0
Cost of goods sold [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense 0.3 0.3 0.5 0.8
Selling, general and administrative expenses [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense $ 4.7 $ 5.3 $ 6.9 $ 11.2