Business Segment Information - Net Sales to External Customers and Long-lived Assets, by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 250.3	$ 282.8	$ 770.4	$ 875.2
Total long-lived assets, net	202.3		202.3		$ 215.7
Total long-lived assets including right of use assets, net	241.0		241.0
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	109.7	123.5	340.9	354.8
Total long-lived assets, net					63.3
Total long-lived assets including right of use assets, net	75.0		75.0
CZECH REPUBLIC
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets, net					18.7
Total long-lived assets including right of use assets, net	17.2		17.2
CANADA
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets, net					29.0
Total long-lived assets including right of use assets, net	26.6		26.6
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	27.6	36.2	81.1	124.3
Total long-lived assets, net					48.4
Total long-lived assets including right of use assets, net	49.5		49.5
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	28.3	29.3	95.2	96.7
Total long-lived assets, net					37.9
Total long-lived assets including right of use assets, net	42.1		42.1
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	84.7	$ 93.8	253.2	$ 299.4
Total long-lived assets, net					$ 18.4
Total long-lived assets including right of use assets, net	$ 30.6		$ 30.6