Restructuring Expenses (Details) $ in Millions	3 Months Ended			9 Months Ended	72 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2020 USD ($) employee	Dec. 31, 2019 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, headcount reduction (approximately) | employee				320	4,160
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	$ 4.9	$ 3.6	$ 4.8	$ 4.8
Quarterly Provision	0.9	3.8	0.9
Provision Reversal	(0.1)		(0.1)
Restructuring Charges, Settled without Cash		(1.6)
Restructuring Charges, Cash		2.2
Quarterly Cash Activities	(1.1)	(0.8)	(1.9)
Foreign currency translation		(0.1)	(0.1)
Restructuring reserve, end of period	4.6	4.9	3.6	4.6	$ 4.8
Write-down Of Property, Plant And Equipment [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	0.0	0.0	0.0	0.0
Quarterly Provision	0.0	1.6	0.0
Provision Reversal	0.0		0.0
Restructuring Charges, Settled without Cash		(1.6)
Restructuring Charges, Cash		0.0
Quarterly Cash Activities	0.0	0.0	0.0
Foreign currency translation		0.0	0.0
Restructuring reserve, end of period	0.0	0.0	0.0	0.0	0.0
Employee Severance
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	4.9	3.6	4.8	4.8
Quarterly Provision	0.9	2.2	0.7
Provision Reversal	(0.1)		(0.1)
Restructuring Charges, Settled without Cash		0.0
Restructuring Charges, Cash		2.2
Quarterly Cash Activities	(1.1)	(0.8)	(1.7)
Foreign currency translation		(0.1)	(0.1)
Restructuring reserve, end of period	4.6	4.9	3.6	4.6	4.8
Facility Closure Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning of period	0.0	0.0	0.0	0.0
Quarterly Provision	0.0	0.0	0.2
Provision Reversal	0.0		0.0
Restructuring Charges, Settled without Cash		0.0
Restructuring Charges, Cash		0.0
Quarterly Cash Activities	0.0	0.0	(0.2)
Foreign currency translation		0.0	0.0
Restructuring reserve, end of period	$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0