Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 29, 2020

Revenue from Contracts with Customers [Abstract]

Disaggregation of Revenue

The following table disaggregates our revenue by major source (product line) for the three-month periods ended March 29, 2020 and March 31, 2019:

(millions of dollars)	Three Months Ended
Net Sales	Mar. 29, 2020		Mar. 31, 2019
Metalcasting	$	61.7	$	73.2
Household, Personal Care & Specialty Products		96.2		94.8
Environmental Products		11.5		15.9
Building Materials		16.8		15.3
Performance Materials		186.2		199.2
Paper PCC		85.1		91.5
Specialty PCC		17.5		18.1
Ground Calcium Carbonate		22.6		22.3
Talc		11.9		12.5
Specialty Minerals		137.1		144.4
Refractory Products		55.8		62.0
Metallurgical Products		13.2		11.8
Refractories		69.0		73.8
Energy Services		25.2		20.3
Total	$	417.5	$	437.7