Restructuring - Costs Included in Selling, General & Administrative Expenses (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) employee	Jun. 30, 2019 USD ($)
Restructuring and Related Activities [Abstract]
Number of employees | employee			200
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 3.0	$ 1.1	$ 7.3	$ 4.7
Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2.7	0.7	6.2	3.5
Other
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 0.3	$ 0.4	$ 1.1	$ 1.2