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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 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense $ 8.7 $ 7.9 $ 31.5 $ 19.6
Cost of goods sold [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense 0.8 0.7 2.4 1.6
Selling, general and administrative expenses [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Stock compensation expense $ 7.9 $ 7.2 $ 29.1 $ 18.0