Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 421.5	$ 469.5
North America
Disaggregation of Revenue [Line Items]
Revenues	118.1	144.5
Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	183.7	194.6
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	100.3	109.2
Latin America
Disaggregation of Revenue [Line Items]
Revenues	19.4	21.2
Catalysts Technologies
Disaggregation of Revenue [Line Items]
Revenues	308.0	349.7
Catalysts Technologies | North America
Disaggregation of Revenue [Line Items]
Revenues	91.0	118.0
Catalysts Technologies | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	128.6	131.5
Catalysts Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	78.1	88.1
Catalysts Technologies | Latin America
Disaggregation of Revenue [Line Items]
Revenues	10.3	12.1
Catalysts Technologies | Refining Catalysts
Disaggregation of Revenue [Line Items]
Revenues	168.6	181.8
Catalysts Technologies | Refining Catalysts | North America
Disaggregation of Revenue [Line Items]
Revenues	55.7	72.2
Catalysts Technologies | Refining Catalysts | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	75.9	66.6
Catalysts Technologies | Refining Catalysts | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	31.5	35.7
Catalysts Technologies | Refining Catalysts | Latin America
Disaggregation of Revenue [Line Items]
Revenues	5.5	7.3
Catalysts Technologies | Polyolefin and Chemical Catalysts
Disaggregation of Revenue [Line Items]
Revenues	139.4	167.9
Catalysts Technologies | Polyolefin and Chemical Catalysts | North America
Disaggregation of Revenue [Line Items]
Revenues	35.3	45.8
Catalysts Technologies | Polyolefin and Chemical Catalysts | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	52.7	64.9
Catalysts Technologies | Polyolefin and Chemical Catalysts | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	46.6	52.4
Catalysts Technologies | Polyolefin and Chemical Catalysts | Latin America
Disaggregation of Revenue [Line Items]
Revenues	4.8	4.8
Materials Technologies
Disaggregation of Revenue [Line Items]
Revenues	113.5	119.8
Materials Technologies | North America
Disaggregation of Revenue [Line Items]
Revenues	27.1	26.5
Materials Technologies | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	55.1	63.1
Materials Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	22.2	21.1
Materials Technologies | Latin America
Disaggregation of Revenue [Line Items]
Revenues	9.1	9.1
Materials Technologies | Coatings
Disaggregation of Revenue [Line Items]
Revenues	36.6	38.2
Materials Technologies | Coatings | North America
Disaggregation of Revenue [Line Items]
Revenues	7.2	7.0
Materials Technologies | Coatings | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	18.4	19.7
Materials Technologies | Coatings | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	8.6	9.4
Materials Technologies | Coatings | Latin America
Disaggregation of Revenue [Line Items]
Revenues	2.4	2.1
Materials Technologies | Consumer/Pharma
Disaggregation of Revenue [Line Items]
Revenues	33.5	37.0
Materials Technologies | Consumer/Pharma | North America
Disaggregation of Revenue [Line Items]
Revenues	10.3	9.3
Materials Technologies | Consumer/Pharma | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	13.6	19.0
Materials Technologies | Consumer/Pharma | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	4.8	4.0
Materials Technologies | Consumer/Pharma | Latin America
Disaggregation of Revenue [Line Items]
Revenues	4.8	4.7
Materials Technologies | Chemical process
Disaggregation of Revenue [Line Items]
Revenues	37.8	38.9
Materials Technologies | Chemical process | North America
Disaggregation of Revenue [Line Items]
Revenues	8.2	9.0
Materials Technologies | Chemical process | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	19.0	19.9
Materials Technologies | Chemical process | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	8.7	7.7
Materials Technologies | Chemical process | Latin America
Disaggregation of Revenue [Line Items]
Revenues	1.9	2.3
Materials Technologies | Other
Disaggregation of Revenue [Line Items]
Revenues	5.6	5.7
Materials Technologies | Other | North America
Disaggregation of Revenue [Line Items]
Revenues	1.4	1.2
Materials Technologies | Other | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	4.1	4.5
Materials Technologies | Other | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0.1	0.0
Materials Technologies | Other | Latin America
Disaggregation of Revenue [Line Items]
Revenues	$ 0.0	$ 0.0