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Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Abstract] |  |  |
Net sales | $ 1,858.3 | $ 1,594.8 | $ 1,791.0
Household, Personal Care and Specialty Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 460.5 | 380.2 | 376.6
Metalcasting [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 319.2 | 258.1 | 291.2
Environmental Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 136.3 | 131.6 | 181.8
Building Materials [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 60.0 | 55.9 | 68.9
Paper PCC [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 349.7 | 308.4 | 364.9
Specialty PCC [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 77.1 | 69.3 | 69.1
Ground Calcium Carbonate [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 98.1 | 89.3 | 91.3
Talc [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 54.0 | 43.9 | 49.1
Refractory Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 237.1 | 212.3 | 244.8
Metallurgical Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 66.3 | 45.8 | 53.3
Performance Materials [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 976.0 | 825.8 | 918.5
Performance Materials [Member] | Household, Personal Care and Specialty Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 460.5 | 380.2 | 376.6
Performance Materials [Member] | Metalcasting [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 319.2 | 258.1 | 291.2
Performance Materials [Member] | Environmental Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 136.3 | 131.6 | 181.8
Performance Materials [Member] | Building Materials [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 60.0 | 55.9 | 68.9
Specialty Minerals [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 578.9 | 510.9 | 574.4
Specialty Minerals [Member] | Paper PCC [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 349.7 | 308.4 | 364.9
Specialty Minerals [Member] | Specialty PCC [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 77.1 | 69.3 | 69.1
Specialty Minerals [Member] | Ground Calcium Carbonate [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 98.1 | 89.3 | 91.3
Specialty Minerals [Member] | Talc [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 54.0 | 43.9 | 49.1
Refractories [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 303.4 | 258.1 | 298.1
Refractories [Member] | Refractory Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | 237.1 | 212.3 | 244.8
Refractories [Member] | Metallurgical Products [Member] |  |  |
Disaggregation of Revenue [Abstract] |  |  |
Net sales | $ 66.3 | $ 45.8 | $ 53.3

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