Revenue Recognition (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) revenue_source	Sep. 30, 2019 USD ($)
Revenue from External Customer [Line Items]
Number of revenue sources | revenue_source			2
Total revenues	$ 279.3	$ 256.4	$ 795.0	$ 784.3
United States
Revenue from External Customer [Line Items]
Total revenues	148.9	131.9	403.6	400.9
Europe and the former Commonwealth of Independent States
Revenue from External Customer [Line Items]
Total revenues	49.1	51.1	156.1	163.8
Asia/Pacific (including China)
Revenue from External Customer [Line Items]
Total revenues	51.9	43.1	151.1	128.7
Latin America
Revenue from External Customer [Line Items]
Total revenues	13.5	13.0	38.9	39.9
Other foreign countries
Revenue from External Customer [Line Items]
Total revenues	15.9	17.3	45.3	51.0
Product revenues
Revenue from External Customer [Line Items]
Total revenues	262.4	238.7	741.1	728.4
Materials conversion revenues
Revenue from External Customer [Line Items]
Total revenues	15.0	15.2	46.8	47.8
Other revenues
Revenue from External Customer [Line Items]
Total revenues	1.9	2.5	7.1	8.1
AMS
Revenue from External Customer [Line Items]
Total revenues	138.9	126.1	394.6	373.3
AMS | United States
Revenue from External Customer [Line Items]
Total revenues	103.6	87.8	275.7	258.5
AMS | Europe and the former Commonwealth of Independent States
Revenue from External Customer [Line Items]
Total revenues	9.0	12.1	32.7	38.7
AMS | Asia/Pacific (including China)
Revenue from External Customer [Line Items]
Total revenues	21.9	20.7	68.3	58.4
AMS | Latin America
Revenue from External Customer [Line Items]
Total revenues	1.6	1.8	6.4	5.3
AMS | Other foreign countries
Revenue from External Customer [Line Items]
Total revenues	2.8	3.7	11.5	12.4
AMS | Product revenues
Revenue from External Customer [Line Items]
Total revenues	135.8	122.7	379.9	362.9
AMS | Materials conversion revenues
Revenue from External Customer [Line Items]
Total revenues	2.5	2.3	11.3	6.2
AMS | Other revenues
Revenue from External Customer [Line Items]
Total revenues	0.6	1.1	3.4	4.2
EP
Revenue from External Customer [Line Items]
Total revenues	140.4	130.3	400.4	411.0
EP | United States
Revenue from External Customer [Line Items]
Total revenues	45.3	44.1	127.9	142.4
EP | Europe and the former Commonwealth of Independent States
Revenue from External Customer [Line Items]
Total revenues	40.1	39.0	123.4	125.1
EP | Asia/Pacific (including China)
Revenue from External Customer [Line Items]
Total revenues	30.0	22.4	82.8	70.3
EP | Latin America
Revenue from External Customer [Line Items]
Total revenues	11.9	11.2	32.5	34.6
EP | Other foreign countries
Revenue from External Customer [Line Items]
Total revenues	13.1	13.6	33.8	38.6
EP | Product revenues
Revenue from External Customer [Line Items]
Total revenues	126.6	116.0	361.2	365.5
EP | Materials conversion revenues
Revenue from External Customer [Line Items]
Total revenues	12.5	12.9	35.5	41.6
EP | Other revenues
Revenue from External Customer [Line Items]
Total revenues	$ 1.3	$ 1.4	$ 3.7	$ 3.9