Segment Information - Schedule Of Operations In Geographical Areas (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 2,282.0	$ 2,751.6	$ 2,844.5
Property, plant and equipment, net	303.0	290.3	261.6
United States
Segment Reporting Information [Line Items]
Sales	1,012.9	1,210.6	1,240.5
Property, plant and equipment, net	167.2	160.1	144.1
China
Segment Reporting Information [Line Items]
Sales	215.6	212.8	187.9
Sweden
Segment Reporting Information [Line Items]
Property, plant and equipment, net	47.2	36.2	20.0
Germany
Segment Reporting Information [Line Items]
Sales	144.6	151.3	164.7
Property, plant and equipment, net	24.1	25.4	29.1
Switzerland
Segment Reporting Information [Line Items]
Property, plant and equipment, net	13.3	14.2	15.9
All other
Segment Reporting Information [Line Items]
Sales	908.9	1,176.9	1,251.4
Property, plant and equipment, net	$ 51.2	$ 54.4	$ 52.5