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v3.22.0.1

Segment and Related Information, Segment Information (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) Segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Segment and Related Information [Abstract] |  |  |
Number of reportable segments | Segment | 3 |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | $ 1,858.3 | $ 1,594.8 | $ 1,791.0
Income from operations | 235.7 | 187.9 | 208.7
Depreciation, depletion and amortization | 94.6 | 93.9 | 98.4
Segment assets | 3,374.2 | 3,209.4 | 3,112.6
Capital expenditures | 86.0 | 66.8 | 65.0
Segment and Related Information [Abstract] |  |  |
Litigation expenses | 0.0 | (10.4) | (10.9)
Acquisition-related expenses | (4.0) | (3.1) | 0.0
Unallocated corporate expenses | (7.5) | (10.7) | (8.2)
Consolidated income from operations | 235.7 | 187.9 | 208.7
Non-operating deductions, net | (33.4) | (49.9) | (51.4)
Income from operations before provision for taxes and equity in earnings | 202.3 | 138.0 | 157.3
Performance Materials [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 976.0 | 825.8 | 918.5
Specialty Minerals [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 578.9 | 510.9 | 574.4
Refractories [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 303.4 | 258.1 | 298.1
Reportable Segments [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 1,858.3 | 1,594.8 | 1,791.0
Income from operations | 247.2 | 212.1 | 227.8
Depreciation, depletion and amortization | 94.6 | 93.9 | 98.4
Segment assets | 3,292.2 | 3,069.5 | 3,031.0
Capital expenditures | 83.4 | 66.6 | 64.9
Segment and Related Information [Abstract] |  |  |
Consolidated income from operations | 247.2 | 212.1 | 227.8
Reportable Segments [Member] | Performance Materials [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 976.0 | 825.8 | 918.5
Income from operations | 125.0 | 108.8 | 104.9
Depreciation, depletion and amortization | 49.2 | 47.4 | 51.0
Segment assets | 2,393.2 | 2,219.1 | 2,212.7
Capital expenditures | 22.0 | 14.6 | 21.5
Segment and Related Information [Abstract] |  |  |
Consolidated income from operations | 125.0 | 108.8 | 104.9
Reportable Segments [Member] | Specialty Minerals [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 578.9 | 510.9 | 574.4
Income from operations | 72.9 | 67.8 | 83.1
Depreciation, depletion and amortization | 38.4 | 39.6 | 40.4
Segment assets | 605.9 | 559.6 | 525.1
Capital expenditures | 51.7 | 46.5 | 37.7
Segment and Related Information [Abstract] |  |  |
Consolidated income from operations | 72.9 | 67.8 | 83.1
Reportable Segments [Member] | Refractories [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Net sales | 303.4 | 258.1 | 298.1
Income from operations | 49.3 | 35.5 | 39.8
Depreciation, depletion and amortization | 7.0 | 6.9 | 7.0
Segment assets | 293.1 | 290.8 | 293.2
Capital expenditures | 9.7 | 5.5 | 5.7
Segment and Related Information [Abstract] |  |  |
Consolidated income from operations | 49.3 | 35.5 | 39.8
Unallocated and Other Corporate Expenses [Member] |  |  |
Segment Reporting Information [Abstract] |  |  |
Segment assets | 82.0 | 139.9 | 81.6
Capital expenditures | $ 2.6 | $ 0.2 | $ 0.1

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