Revenue from Contracts with Customers - Disaggregation of Revenue by Major Source (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 05, 2026	Mar. 30, 2025
Revenue from Contracts with Customers [Abstract]
Net sales	$ 546.9	$ 491.8
Household & Personal Care [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	142.4	123.1
Specialty Additives [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	154.2	145.2
High-Temperature Technologies [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	183.3	169.4
Environmental & Infrastructure [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	67.0	54.1
Consumer & Specialties [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	296.6	268.3
Consumer & Specialties [Member] | Household & Personal Care [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	142.4	123.1
Consumer & Specialties [Member] | Specialty Additives [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	154.2	145.2
Engineered Solutions [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	250.3	223.5
Engineered Solutions [Member] | High-Temperature Technologies [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	183.3	169.4
Engineered Solutions [Member] | Environmental & Infrastructure [Member]
Revenue from Contracts with Customers [Abstract]
Net sales	$ 67.0	$ 54.1