Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2022	Apr. 04, 2021
Disaggregation of Revenue [Abstract]
Net sales	$ 519.1	$ 452.6
Household, Personal Care & Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	142.5	109.4
Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Net sales	80.2	81.7
Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	35.9	26.0
Building Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	13.5	13.8
Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	96.8	89.6
Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	24.2	20.4
Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Net sales	26.5	24.0
Talc [Member]
Disaggregation of Revenue [Abstract]
Net sales	15.6	13.8
Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	64.8	58.8
Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	19.1	15.1
Performance Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	272.1	230.9
Performance Materials [Member] | Household, Personal Care & Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	142.5	109.4
Performance Materials [Member] | Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Net sales	80.2	81.7
Performance Materials [Member] | Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	35.9	26.0
Performance Materials [Member] | Building Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	13.5	13.8
Specialty Minerals [Member]
Disaggregation of Revenue [Abstract]
Net sales	163.1	147.8
Specialty Minerals [Member] | Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	96.8	89.6
Specialty Minerals [Member] | Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	24.2	20.4
Specialty Minerals [Member] | Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Net sales	26.5	24.0
Specialty Minerals [Member] | Talc [Member]
Disaggregation of Revenue [Abstract]
Net sales	15.6	13.8
Refractories [Member]
Disaggregation of Revenue [Abstract]
Net sales	83.9	73.9
Refractories [Member] | Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	64.8	58.8
Refractories [Member] | Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 19.1	$ 15.1