Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Deferred tax asset cumulative loss position term	3 years	3 years
Unrecognized tax benefits, if recognized, would affect the effective tax rate	$ 0.2	$ 1.0
Tax expense (benefit) in net interest and penalties due to expiration of various uncertain tax positions	(0.1)	$ 0.1
Payment of interest and penalties accrued	0.2
Decrease in unrecognized tax benefits is reasonably possible	0.2
Undistributed earnings of foreign subsidiaries	201.8
Undistributed earnings, subject to transition tax	135.9
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	34.7
Operating loss carryforward, subject to expiration	15.0
Tax credit carryforward	0.5
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	3.2
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards for income tax purposes	$ 2.2