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v3.25.1

Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Net sales | $ 440.8 | $ 500.2
Gross profit | 125.1 | 155.7
Adjustment to fair value of contingent consideration | (0.7) | (0.8)
Profit on disposal of property, plant and equipment | 0.1 | 0.1
Operating income/(loss) | 42.5 | 50.5
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Adjustment to fair value of contingent consideration | (0.7) | (0.8)
Profit on disposal of property, plant and equipment | 0.1 | 0.1
Operating Segments [Member] | Performance Chemicals [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 168.4 | 160.8
Gross profit | 35.3 | 37.7
Operating income/(loss) | 19.8 | 21.1
Operating Segments [Member] | Fuel Specialties [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 170.3 | 176.9
Gross profit | 60.8 | 60.6
Operating income/(loss) | 36.9 | 33.4
Operating Segments [Member] | Oilfield Services [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 102.1 | 162.5
Gross profit | 29.0 | 57.4
Operating income/(loss) | 4.1 | 16.9
Operating Segments [Member] | Personal Care [Member] | Performance Chemicals [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 100.6 | 94.8
Operating Segments [Member] | Home Care [Member] | Performance Chemicals [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 26.3 | 26.4
Operating Segments [Member] | Other [Member] | Performance Chemicals [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 41.5 | 39.6
Operating Segments [Member] | Refinery and Performance [Member] | Fuel Specialties [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 129.4 | 145.1
Operating Segments [Member] | Other [Member] | Fuel Specialties [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 40.9 | 31.8
Corporate, Non-Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Corporate costs | $ (17.7) | $ (20.2)

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