Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Abstract]
Net sales	$ 2,125.5	$ 1,858.3	$ 1,594.8
Household, Personal Care and Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	560.9	460.5	380.2
Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Net sales	334.0	319.2	258.1
Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	174.1	136.3	131.6
Building Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	58.7	60.0	55.9
Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	381.7	349.7	308.4
Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	100.4	77.1	69.3
Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Net sales	109.1	98.1	89.3
Talc [Member]
Disaggregation of Revenue [Abstract]
Net sales	57.2	54.0	43.9
Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	273.4	237.1	212.3
Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	76.0	66.3	45.8
Performance Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	1,127.7	976.0	825.8
Performance Materials [Member] | Household, Personal Care and Specialty Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	560.9	460.5	380.2
Performance Materials [Member] | Metalcasting [Member]
Disaggregation of Revenue [Abstract]
Net sales	334.0	319.2	258.1
Performance Materials [Member] | Environmental Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	174.1	136.3	131.6
Performance Materials [Member] | Building Materials [Member]
Disaggregation of Revenue [Abstract]
Net sales	58.7	60.0	55.9
Specialty Minerals [Member]
Disaggregation of Revenue [Abstract]
Net sales	648.4	578.9	510.9
Specialty Minerals [Member] | Paper PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	381.7	349.7	308.4
Specialty Minerals [Member] | Specialty PCC [Member]
Disaggregation of Revenue [Abstract]
Net sales	100.4	77.1	69.3
Specialty Minerals [Member] | Ground Calcium Carbonate [Member]
Disaggregation of Revenue [Abstract]
Net sales	109.1	98.1	89.3
Specialty Minerals [Member] | Talc [Member]
Disaggregation of Revenue [Abstract]
Net sales	57.2	54.0	43.9
Refractories [Member]
Disaggregation of Revenue [Abstract]
Net sales	349.4	303.4	258.1
Refractories [Member] | Refractory Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	273.4	237.1	212.3
Refractories [Member] | Metallurgical Products [Member]
Disaggregation of Revenue [Abstract]
Net sales	$ 76.0	$ 66.3	$ 45.8