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Stock-Based Compensation (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense $ 7.8 $ 7.7 $ 24.8 $ 21.7
Stock compensation cost capitalized as inventory     1.9  
Stock option awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense 2.6 3.2 8.2 7.8
Restricted stock awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense 1.7 2.3 5.8 6.4
Performance share awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense 1.4 2.2 4.5 6.1
Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense 0.0 0.0 1.3 1.4
Stock Appreciation Rights        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense 2.1 0.0 5.0 0.0
Non-U.S. Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Pre-tax compensation expense $ 2.8 $ 1.1 $ 7.3 $ 1.1