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Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net sales	$ 513.0	$ 376.1	$ 1,453.0	$ 1,070.2
Gross profit/(loss)	156.0	112.9	435.1	322.0
Operating income/(loss)	50.1	31.4	140.7	96.6
Operating Segments [Member] | Fuel Specialties [Member]
Segment Reporting Information [Line Items]
Net sales	178.7	156.4	546.9	438.8
Gross profit/(loss)	53.4	49.1	171.0	144.1
Operating income/(loss)	27.9	26.6	94.9	78.9
Operating Segments [Member] | Fuel Specialties [Member] | Refinery and Performance [Member]
Segment Reporting Information [Line Items]
Net sales	133.2	113.8	405.5	307.9
Operating Segments [Member] | Fuel Specialties [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales	34.7	32.6	112.4	100.4
Operating Segments [Member] | Performance Chemicals [Member]
Segment Reporting Information [Line Items]
Net sales	159.7	132.8	495.8	386.9
Gross profit/(loss)	39.1	32.6	123.5	95.6
Operating income/(loss)	25.4	17.8	79.5	54.0
Operating Segments [Member] | Performance Chemicals [Member] | Personal Care [Member]
Segment Reporting Information [Line Items]
Net sales	102.4	75.8	311.1	217.8
Operating Segments [Member] | Performance Chemicals [Member] | Home Care [Member]
Segment Reporting Information [Line Items]
Net sales	22.6	24.4	72.3	68.7
Operating Segments [Member] | Performance Chemicals [Member] | Other [Member]
Segment Reporting Information [Line Items]
Net sales	45.5	42.6	141.4	130.9
Operating Segments [Member] | Oilfield Services [Member]
Segment Reporting Information [Line Items]
Net sales	174.6	86.9	410.3	244.5
Gross profit/(loss)	63.5	31.2	140.6	82.3
Operating income/(loss)	14.2	2.7	21.2	6.1
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Corporate costs	$ (17.4)	$ (15.7)	$ (54.9)	$ (42.4)

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