Revenue from Contracts with Customers (Tables)

6 Months Ended

Jul. 01, 2018

Revenue from Contracts with Customers [Abstract]

Disaggregation of Revenue

The following table disaggregates our revenue by major source (product line) for the three and six month periods ended July 1, 2018 and July 2, 2017:

	Three Months Ended				Six Months Ended
	July 1, 2018		July 2, 2017		July 1, 2018		July 2, 2017
	(millions of dollars)
Net Sales
Metalcasting	$	88.8	$	75.7	$	168.0	$	142.3
Household, Personal Care and Specialty Products		58.6		39.7		107.3		80.8
Environmental Products		25.2		19.6		37.9		30.2
Building Materials		18.0		20.2		36.9		37.6
Basic Minerals		23.9		25.1		51.7		59.3
Performance Materials		214.5		180.3		401.8		350.2
Paper PCC		94.5		92.3		191.5		185.7
Specialty PCC		17.3		17.4		34.3		34.4
Ground Calcium Carbonate		25.2		23.3		47.7		44.8
Talc		13.9		14.0		27.0		28.3
Specialty Minerals		150.9		147.0		300.5		293.2
Refractory Products		66.7		56.1		129.0		112.8
Metallurgical Products		12.9		12.8		25.9		26.3
Refractories		79.6		68.9		154.9		139.1
Energy Services		19.7		17.9		38.8		36.6
Total	$	464.7	$	414.1	$	896.0	$	819.1