Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Abstract]
Net sales	$ 2,118.5	$ 2,169.9	$ 2,125.5
Household & Personal Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	530.0	517.6	476.2
Specialty Additives [Member]
Disaggregation of Revenue [Abstract]
Net sales	610.2	642.6	648.4
High-Temperature Technologies [Member]
Disaggregation of Revenue [Abstract]
Net sales	713.2	720.9	702.5
Environmental & Infrastructure [Member]
Disaggregation of Revenue [Abstract]
Net sales	265.1	288.8	298.4
Consumer & Specialties [Member]
Disaggregation of Revenue [Abstract]
Net sales	1,140.2	1,160.2	1,124.6
Consumer & Specialties [Member] | Household & Personal Care [Member]
Disaggregation of Revenue [Abstract]
Net sales	530.0	517.6	476.2
Consumer & Specialties [Member] | Specialty Additives [Member]
Disaggregation of Revenue [Abstract]
Net sales	610.2	642.6	648.4
Engineered Solutions [Member]
Disaggregation of Revenue [Abstract]
Net sales	978.3	1,009.7	1,000.9
Engineered Solutions [Member] | High-Temperature Technologies [Member]
Disaggregation of Revenue [Abstract]
Net sales	713.2	720.9	702.5
Engineered Solutions [Member] | Environmental & Infrastructure [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 265.1	$ 288.8	$ 298.4