Contingencies (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 02, 2017 USD ($) Case	Jul. 02, 2017 USD ($) Contract Load Case	Oct. 24, 2014 USD ($)	Dec. 31, 2009
Loss Contingencies [Line Items]
Number of contracts entered | Contract		2
Number of ship loads | Load		60
Default arbitration award | $		$ 70.0
Site Contingency [Line Items]
Consent decree paid by US government | $			$ 2.3
AMCOL International Corporation [Member]
Loss Contingencies [Line Items]
Ownership interest	19.00%	19.00%		20.00%
Silica Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	3	3
Cumulative number of cases dismissed	1,493	1,493
Number of lawsuits settled		1
Asbestos Cases [Member]
Loss Contingencies [Line Items]
Number of pending cases	19	19
Cumulative number of cases dismissed	50	50
Number of cases dismissed	1
Number of new cases filed during the quarter	2
Number of lawsuits settled		0
Number of cases claim liability		16
Number of allege liability		2
Number of cases with no alleged exposure		1
Asbestos Cases [Member] | AMCOL International Corporation [Member]
Loss Contingencies [Line Items]
Number of new cases filed during the quarter	1
Administrative Consent Order for Contamination Associated with Historic Use of PCBs [Member]
Site Contingency [Line Items]
Location of plant		Canaan, Connecticut
Estimated accrued remediation cost | $	$ 0.4	$ 0.4
Administrative Consent Order for Installation of Groundwater Contamination System [Member]
Site Contingency [Line Items]
Location of plant		Adams, Massachusetts plant
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