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Segment Reporting and Geographical Area Data - Summary of Segment Reporting related to Cost of Goods Sold (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Total cost of goods sold | $ 1,285.6 | $ 1,302.5 | $ 1,357.7
Operating Segments [Member] | Performance Chemicals [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total cost of goods sold | 559.4 | 505.3 | 456.0
Operating Segments [Member] | Fuel Specialties [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total cost of goods sold | 449.3 | 461.2 | 480.8
Operating Segments [Member] | Oilfield Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total cost of goods sold | $ 276.9 | $ 336.0 | $ 420.9

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