Revenue from Contracts with Customers (Tables)

3 Months Ended

Apr. 01, 2018

Revenue from Contracts with Customers [Abstract]

Disaggregation of Revenue

The following table disaggregates our revenue by major source (product line) for the period ended April 1, 2018 and April 2, 2017:

	Three Months Ended
	Apr. 1, 2018		Apr. 2, 2017
	(millions of dollars)
Net Sales
Metalcasting	$	79.2	$	66.6
Household, Personal Care and Specialty Products		48.7		41.1
Environmental Products		12.7		10.6
Building Materials		18.9		17.4
Basic Minerals		27.8		34.2
Performance Materials		187.3		169.9
Paper PCC		97.0		93.4
Specialty PCC		17.0		17.0
Talc		13.1		14.3
Ground Calcium Carbonate		22.5		21.5
Specialty Minerals		149.6		146.2
Refractory Products		62.3		56.7
Metallurgical Products		13.0		13.5
Refractories		75.3		70.2
Energy Services		19.1		18.7
Total	$	431.3	$	405.0