Contingencies (Details) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2019 Case	Jun. 30, 2019 USD ($) Case	Jun. 30, 2019 USD ($) 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	3
Cumulative number of cases dismissed		1,493	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		71	71
Cumulative number of cases dismissed		59	59
Number of new cases filed		13	20
Number of cases dismissed			2
Number of lawsuits settled			0
Number of cases claim liability			45
Number of cases with no alleged exposure date			20
Number of allege liability			22
Asbestos Cases [Member] | Subsequent Event [Member]
Loss Contingency, Information about Litigation Matters [Abstract] [Abstract]
Number of new cases filed	16
Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Abstract]
Estimated accrued remediation cost | $		$ 0.4	$ 0.4
Administrative Consent Order for Installation of Groundwater Contamination System [Member]
Site Contingency [Abstract]
Estimated accrued remediation cost | $		$ 0.4	0.4
Estimated cost of wastewater treatment upgrades, lower range | $			6.0
Estimated cost of wastewater treatment upgrades, upper range | $			$ 8.0