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Segment and Related Information, Sales By Product Category (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 03, 2022	Apr. 04, 2021
Segment and Related Information [Abstract]
Net sales	$ 519.1	$ 452.6
Household, Personal Care & Specialty Products [Member]
Segment and Related Information [Abstract]
Net sales	142.5	109.4
Metalcasting [Member]
Segment and Related Information [Abstract]
Net sales	80.2	81.7
Environmental Products [Member]
Segment and Related Information [Abstract]
Net sales	35.9	26.0
Building Materials [Member]
Segment and Related Information [Abstract]
Net sales	13.5	13.8
Paper PCC [Member]
Segment and Related Information [Abstract]
Net sales	96.8	89.6
Specialty PCC [Member]
Segment and Related Information [Abstract]
Net sales	24.2	20.4
Ground Calcium Carbonate [Member]
Segment and Related Information [Abstract]
Net sales	26.5	24.0
Talc [Member]
Segment and Related Information [Abstract]
Net sales	15.6	13.8
Refractory Products [Member]
Segment and Related Information [Abstract]
Net sales	64.8	58.8
Metallurgical Products [Member]
Segment and Related Information [Abstract]
Net sales	$ 19.1	$ 15.1

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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