Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 470.5	$ 494.9	$ 1,453.6	$ 1,412.1
North America
Disaggregation of Revenue [Line Items]
Revenues	137.5	152.9	437.9	426.3
Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	195.6	187.9	604.3	552.0
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	117.5	123.5	345.4	347.8
Latin America
Disaggregation of Revenue [Line Items]
Revenues	19.9	30.6	66.0	86.0
Catalysts Technologies
Disaggregation of Revenue [Line Items]
Revenues	361.4	378.2	1,106.8	1,058.4
Catalysts Technologies | North America
Disaggregation of Revenue [Line Items]
Revenues	111.6	125.3	354.3	346.2
Catalysts Technologies | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	141.9	128.8	433.3	376.1
Catalysts Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	96.7	101.8	279.5	277.2
Catalysts Technologies | Latin America
Disaggregation of Revenue [Line Items]
Revenues	11.2	22.3	39.7	58.9
Catalysts Technologies | Refining Catalysts
Disaggregation of Revenue [Line Items]
Revenues	195.9	204.9	586.0	584.4
Catalysts Technologies | Refining Catalysts | North America
Disaggregation of Revenue [Line Items]
Revenues	69.9	71.7	214.0	208.8
Catalysts Technologies | Refining Catalysts | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	70.3	67.4	210.6	189.7
Catalysts Technologies | Refining Catalysts | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	48.1	49.6	133.9	141.8
Catalysts Technologies | Refining Catalysts | Latin America
Disaggregation of Revenue [Line Items]
Revenues	7.6	16.2	27.5	44.1
Catalysts Technologies | Polyolefin and Chemical Catalysts
Disaggregation of Revenue [Line Items]
Revenues	165.5	173.3	520.8	474.0
Catalysts Technologies | Polyolefin and Chemical Catalysts | North America
Disaggregation of Revenue [Line Items]
Revenues	41.7	53.6	140.3	137.4
Catalysts Technologies | Polyolefin and Chemical Catalysts | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	71.6	61.4	222.7	186.4
Catalysts Technologies | Polyolefin and Chemical Catalysts | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	48.6	52.2	145.6	135.4
Catalysts Technologies | Polyolefin and Chemical Catalysts | Latin America
Disaggregation of Revenue [Line Items]
Revenues	3.6	6.1	12.2	14.8
Materials Technologies
Disaggregation of Revenue [Line Items]
Revenues	109.1	116.7	346.8	353.7
Materials Technologies | North America
Disaggregation of Revenue [Line Items]
Revenues	25.9	27.6	83.6	80.1
Materials Technologies | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	53.7	59.1	171.0	175.9
Materials Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	20.8	21.7	65.9	70.6
Materials Technologies | Latin America
Disaggregation of Revenue [Line Items]
Revenues	8.7	8.3	26.3	27.1
Materials Technologies | Coatings
Disaggregation of Revenue [Line Items]
Revenues	33.7	37.7	107.5	120.6
Materials Technologies | Coatings | North America
Disaggregation of Revenue [Line Items]
Revenues	6.0	7.5	20.0	22.3
Materials Technologies | Coatings | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	16.5	19.0	53.8	59.2
Materials Technologies | Coatings | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	8.4	9.4	26.9	32.6
Materials Technologies | Coatings | Latin America
Disaggregation of Revenue [Line Items]
Revenues	2.8	1.8	6.8	6.5
Materials Technologies | Consumer/Pharma
Disaggregation of Revenue [Line Items]
Revenues	31.2	34.8	106.0	97.7
Materials Technologies | Consumer/Pharma | North America
Disaggregation of Revenue [Line Items]
Revenues	8.8	9.5	30.7	26.1
Materials Technologies | Consumer/Pharma | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	12.6	16.2	45.4	42.9
Materials Technologies | Consumer/Pharma | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	5.0	4.3	15.4	14.5
Materials Technologies | Consumer/Pharma | Latin America
Disaggregation of Revenue [Line Items]
Revenues	4.8	4.8	14.5	14.2
Materials Technologies | Chemical process
Disaggregation of Revenue [Line Items]
Revenues	39.5	38.7	116.7	117.7
Materials Technologies | Chemical process | North America
Disaggregation of Revenue [Line Items]
Revenues	10.1	9.1	28.2	26.6
Materials Technologies | Chemical process | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	21.1	19.9	60.7	61.6
Materials Technologies | Chemical process | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	7.2	8.0	23.0	23.2
Materials Technologies | Chemical process | Latin America
Disaggregation of Revenue [Line Items]
Revenues	1.1	1.7	4.8	6.3
Materials Technologies | Other
Disaggregation of Revenue [Line Items]
Revenues	4.7	5.5	16.6	17.7
Materials Technologies | Other | North America
Disaggregation of Revenue [Line Items]
Revenues	1.0	1.5	4.7	5.1
Materials Technologies | Other | Europe Middle East Africa (EMEA)
Disaggregation of Revenue [Line Items]
Revenues	3.5	4.0	11.1	12.2
Materials Technologies | Other | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues	0.2	0.0	0.6	0.3
Materials Technologies | Other | Latin America
Disaggregation of Revenue [Line Items]
Revenues	$ 0.0	$ 0.0	$ 0.2	$ 0.1