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Organization and Basis of Presentation Inventories (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Jan. 01, 2016
Inventory [Line Items]      
Raw materials and work-in-progress $ 319.7 $ 163.3  
Finished goods 89.6 33.8  
Gross inventories 409.3 197.1  
Inventory valuation reserves (17.3) (14.8)  
Inventories, net 392.0 182.3  
Retained earnings 761.0 423.9  
Deferred tax assets, net   352.8  
New accounting pronouncement or change in accounting principle, effect of change on net income $ 2.4    
New accounting pronouncement or change in accounting principle, effect of change on basic earnings per share $ 0.02    
New accounting pronouncement or change in accounting principle, effect of change on diluted earnings per share $ 0.00    
Restatement Adjustment [Member]      
Inventory [Line Items]      
Raw materials and work-in-progress   49.4  
Inventory valuation reserves   (12.2)  
Inventories, net   37.2 $ 37.2
Retained earnings   25.8 25.8
Deferred tax assets, net   $ 11.4 $ 11.4