Stock-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 8.8	$ 7.0
Stock compensation cost capitalized as inventory	0.9
Stock option awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	3.1	2.0
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	2.0	1.9
Performance share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	1.6	1.7
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	1.3	1.4
Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	0.8	$ 0.0
Non-U.S. Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax compensation expense	$ 1.8