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Contingencies (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2020 USD ($) Case | Dec. 31, 2014 USD ($) | Jun. 28, 2020 USD ($) Case
Silica Cases [Member] |  |  |
Contingencies [Abstract] |  |  |
Number of pending cases | 3 |  | 3
Cumulative number of cases dismissed | 1,493 |  | 1,493
Number of cases dismissed | 0 |  |
Number of lawsuits settled |  |  | 1
Asbestos Cases [Member] |  |  |
Contingencies [Abstract] |  |  |
Number of pending cases | 176 |  | 176
Cumulative number of cases dismissed | 83 |  | 83
Number of new cases filed | 46 |  |
Number of cases dismissed | 5 |  |
Number of lawsuits settled |  |  | 0
Non-AMCOL Asbestos Cases [Member] |  |  |
Contingencies [Abstract] |  |  |
Number of cases subject to indemnification | 136 |  | 136
Number of remaining cases subject to indemnity until dates of exposure | 33 |  | 33
Number of remaining cases | 38 |  | 38
Number of remaining cases alleging exposure occurred after initial public offering | 5 |  | 5
AMCOL Asbestos Cases [Member] |  |  |
Contingencies [Abstract] |  |  |
Number of remaining cases with no available indemnity | 2 |  | 2
Bankruptcy Estate of Novinda [Member] |  |  |
Contingencies [Abstract] |  |  |
Damages, interest and costs awarded to Novinda in arbitration | $ | $ 8.0 |  |
Total litigation expenses | $ | 11.8 |  | $ 11.8
Litigation expense | $ |  |  | 0.9
Canaan, Connecticut Plant [Member] |  |  |
Site Contingency [Abstract] |  |  |
Consent decree paid by US government | $ |  | $ 2.3 |
Accrued remediation costs | $ | 0.4 |  | 0.4
Adams, Massachusetts Plant [Member] |  |  |
Site Contingency [Abstract] |  |  |
Accrued remediation costs | $ | 0.4 |  | 0.4
Adams, Massachusetts Plant [Member] | Minimum [Member] |  |  |
Site Contingency [Abstract] |  |  |
Estimated cost of wastewater treatment upgrades | $ | 6.0 |  | 6.0
Adams, Massachusetts Plant [Member] | Maximum [Member] |  |  |
Site Contingency [Abstract] |  |  |
Estimated cost of wastewater treatment upgrades | $ | $ 8.0 |  | $ 8.0

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