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Segment and Related Information, Sales by Product Category (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment and Related Information [Abstract] |  |  |
Net sales | $ 2,118.5 | $ 2,169.9 | $ 2,125.5
Household & Personal Care [Member] |  |  |
Segment and Related Information [Abstract] |  |  |
Net sales | 530.0 | 517.6 | 476.2
Specialty Additives [Member] |  |  |
Segment and Related Information [Abstract] |  |  |
Net sales | 610.2 | 642.6 | 648.4
High-Temperature Technologies [Member] |  |  |
Segment and Related Information [Abstract] |  |  |
Net sales | 713.2 | 720.9 | 702.5
Environmental & Infrastructure [Member] |  |  |
Segment and Related Information [Abstract] |  |  |
Net sales | $ 265.1 | $ 288.8 | $ 298.4

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