Restructuring Expenses (Details) $ in Millions	3 Months Ended		6 Months Ended	72 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($) employee	Dec. 31, 2019 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Cash	$ 2.2
Restructuring Charges, Settled without Cash	(1.6)
Restructuring and related cost, headcount reduction (approximately) | employee			300	4,160
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	3.6	$ 4.8	$ 4.8
First quarter 2020 provision	3.8	0.9
First quarter 2020 provision reversal		(0.1)
First quarter 2020 cash activity	(0.8)	(1.9)
Foreign currency translation	(0.1)	(0.1)
Restructuring reserve, end of period	4.9	3.6	4.9	$ 4.8
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Cash	2.2
Restructuring Charges, Settled without Cash	0.0
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	3.6	4.8	4.8
First quarter 2020 provision	2.2	0.7
First quarter 2020 provision reversal		(0.1)
First quarter 2020 cash activity	(0.8)	(1.7)
Foreign currency translation	(0.1)	(0.1)
Restructuring reserve, end of period	4.9	3.6	4.9	4.8
Facility Closure Costs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Cash	0.0
Restructuring Charges, Settled without Cash	0.0
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	0.0	0.0	0.0
First quarter 2020 provision	0.0	0.2
First quarter 2020 provision reversal		0.0
First quarter 2020 cash activity	0.0	(0.2)
Foreign currency translation	0.0	0.0
Restructuring reserve, end of period	0.0	0.0	0.0	0.0
Write-down Of Property, Plant And Equipment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Cash	0.0
Restructuring Charges, Settled without Cash	1.6
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	0.0	0.0	0.0
First quarter 2020 provision	1.6	0.0
First quarter 2020 provision reversal		0.0
First quarter 2020 cash activity	0.0	0.0
Foreign currency translation	0.0	0.0
Restructuring reserve, end of period	$ 0.0	$ 0.0	$ 0.0	$ 0.0