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Operations and Summary of Significant Accounting Policies - Stock Compensation Allocation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock compensation expense (credit) $ 18.4 $ 12.5 $ (10.6)
Cost of goods sold      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock compensation expense (credit) 1.5 0.9 (0.9)
Selling, general and administrative expenses      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total stock compensation expense (credit) $ 16.9 $ 11.6 $ (9.7)