Goodwill - Summary of Goodwill (Detail) $ in Millions |
6 Months Ended |
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Jun. 30, 2026
USD ($)
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| Goodwill [Line Items] | |
| Gross cost, beginning balance | $ 399.0 |
| Gross cost, ending balance | 398.2 |
| Performance Chemicals [Member] | |
| Goodwill [Line Items] | |
| Exchange effects | (0.7) |
| Fuel Specialties [Member] | |
| Goodwill [Line Items] | |
| Exchange effects | $ (0.1) |
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Includes amount, before amortization expense and impairment loss, of goodwill for private company. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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