Segment and Related Information, Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2025	Mar. 31, 2024
Segment and Related Information [Abstract]
Net sales	$ 491.8	$ 534.5
Household & Personal Care [Member]
Segment and Related Information [Abstract]
Net sales	123.1	138.4
Specialty Additives [Member]
Segment and Related Information [Abstract]
Net sales	145.2	158.5
High-Temperature Technologies [Member]
Segment and Related Information [Abstract]
Net sales	169.4	177.3
Environmental & Infrastructure [Member]
Segment and Related Information [Abstract]
Net sales	$ 54.1	$ 60.3