Segment and Related Information - Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Segment and Related Information [Abstract]
Net sales	$ 532.4	$ 524.7	$ 1,553.1	$ 1,600.4
Household & Personal Care [Member]
Segment and Related Information [Abstract]
Net sales	129.8	130.9	380.3	396.1
Specialty Additives [Member]
Segment and Related Information [Abstract]
Net sales	147.6	149.4	443.1	465.4
High-Temperature Technologies [Member]
Segment and Related Information [Abstract]
Net sales	178.9	174.8	526.7	536.8
Environmental & Infrastructure [Member]
Segment and Related Information [Abstract]
Net sales	$ 76.1	$ 69.6	$ 203.0	$ 202.1