Contingencies (Details) $ in Millions	1 Months Ended	3 Months Ended
	May 03, 2019 Case	Mar. 31, 2019 USD ($) Case	Oct. 24, 2014 USD ($)
Site Contingency [Abstract]
Consent decree paid by US government | $			$ 2.3
Silica Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of pending cases		3
Cumulative number of cases dismissed		1,493
Number of cases dismissed		0
Number of lawsuits settled		1
Asbestos Cases [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of pending cases		40
Cumulative number of cases dismissed		57
Number of new cases filed		7
Number of cases dismissed		0
Number of lawsuits settled		0
Number of cases claim liability		29
Number of cases with no alleged exposure date		5
Number of allege liability		7
Asbestos Cases [Member] | Subsequent Event [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of new cases filed	3
Asbestos Cases [Member] | AMCOL International Corporation [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of allege liability		4
Asbestos Cases [Member] | Non-AMCOL International Corporation [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of allege liability		2
Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Abstract]
Location of plant		Canaan, Connecticut
Estimated accrued remediation cost | $		$ 0.4
Administrative Consent Order for Installation of Groundwater Contamination System [Member]
Site Contingency [Abstract]
Location of plant		Adams, Massachusetts
Estimated accrued remediation cost | $		$ 0.4
Estimated cost of wastewater treatment upgrades, lower range | $		6.0
Estimated cost of wastewater treatment upgrades, upper range | $		$ 8.0