Segment and Related Information, Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jul. 02, 2023	Jun. 30, 2024	Jul. 02, 2023
Segment and Related Information [Abstract]
Net sales	$ 541.2	$ 551.5	$ 1,075.7	$ 1,097.6
Household & Personal Care [Member]
Segment and Related Information [Abstract]
Net sales	126.8	125.5	265.2	254.7
Specialty Additives [Member]
Segment and Related Information [Abstract]
Net sales	157.5	164.8	316.0	332.9
High-Temperature Technologies [Member]
Segment and Related Information [Abstract]
Net sales	184.7	182.6	362.0	361.2
Environmental & Infrastructure [Member]
Segment and Related Information [Abstract]
Net sales	$ 72.2	$ 78.6	$ 132.5	$ 148.8