Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2019

Revenue from Contracts with Customers [Abstract]

Revenue from Contracts with Customers

Note 3.  Revenue from Contracts with Customers

The following table disaggregates our revenue by major source (product line) for the three-month periods ended March 31, 2019 and April 1, 2018:

(millions of dollars)	Three Months Ended
Net Sales	Mar. 31, 2019		Apr. 1, 2018
Metalcasting	$	73.2	$	79.2
Household, Personal Care & Specialty Products		74.9		48.7
Environmental Products		15.9		12.7
Building Materials		15.3		18.9
Basic Minerals		19.9		27.8
Performance Materials		199.2		187.3
Paper PCC		91.5		97.0
Specialty PCC		18.1		17.0
Ground Calcium Carbonate		22.3		22.5
Talc		12.5		13.1
Specialty Minerals		144.4		149.6
Refractory Products		62.0		62.3
Metallurgical Products		11.8		13.0
Refractories		73.8		75.3
Energy Services		20.3		19.1
Total	$	437.7	$	431.3