Restructuring - Costs Included in Selling, General & Administrative Expenses (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) employee	Mar. 31, 2019 USD ($)
Restructuring and Related Activities [Abstract]
Number of employees | employee	100
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 4.3	$ 3.6
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	3.5	2.8
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0.8	$ 0.8