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v3.25.2

Segment Reporting - Segment Reporting (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 439.7 | $ 435.0 | $ 880.5 | $ 935.2
Gross profit | 123.2 | 126.9 | 248.3 | 282.6
Adjustment to fair value of contingent consideration | (0.8) | (0.6) | (1.5) | (1.4)
Profit on disposal of property, plant and equipment | 0.1 | 0.0 | 0.2 | 0.1
Operating income/(loss) | 34.3 | 40.7 | 76.8 | 91.2
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjustment to fair value of contingent consideration | (0.8) | (0.6) | (1.5) | (1.4)
Profit on disposal of property, plant and equipment | 0.1 | 0.0 | 0.2 | 0.1
Operating Segments [Member] | Performance Chemicals [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 173.8 | 160.1 | 342.2 | 320.9
Gross profit | 30.5 | 36.2 | 65.8 | 73.9
Operating income/(loss) | 14.3 | 21.2 | 34.1 | 42.3
Operating Segments [Member] | Fuel Specialties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 165.1 | 166.6 | 335.4 | 343.5
Gross profit | 62.9 | 57.6 | 123.7 | 118.2
Operating income/(loss) | 35.4 | 30.4 | 72.3 | 63.8
Operating Segments [Member] | Oilfield Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 100.8 | 108.3 | 202.9 | 270.8
Gross profit | 29.8 | 33.1 | 58.8 | 90.5
Operating income/(loss) | 6.2 | 7.3 | 10.3 | 24.2
Operating Segments [Member] | Personal Care [Member] | Performance Chemicals [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 105.0 | 97.7 | 205.5 | 192.5
Operating Segments [Member] | Home Care [Member] | Performance Chemicals [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 26.1 | 24.3 | 52.4 | 50.7
Operating Segments [Member] | Other [Member] | Performance Chemicals [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 42.7 | 38.1 | 84.3 | 77.7
Operating Segments [Member] | Refinery and Performance [Member] | Fuel Specialties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 112.8 | 109.1 | 242.2 | 254.2
Operating Segments [Member] | Other [Member] | Fuel Specialties [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 52.3 | 57.5 | 93.2 | 89.3
Corporate, Non-Segment [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Corporate costs | $ (20.9) | $ (17.6) | $ (38.6) | $ (37.8)

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