Revenue from Contracts with Customers

9 Months Ended

Sep. 27, 2020

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 and nine-month periods ended September 27, 2020 and September 29, 2019 :

(millions of dollars)	Three Months Ended				Nine Months Ended
Net Sales	Sep. 27, 2020		Sep. 29, 2019		Sep. 27, 2020		Sep. 29, 2019
Metalcasting	$	66.3	$	69.0	$	180.8	$	218.0
Household, Personal Care & Specialty Products		93.9		94.1		278.0		280.4
Environmental Products		16.9		27.1		48.3		72.0
Building Materials		13.5		17.1		43.5		51.5
Performance Materials		190.6		207.3		550.6		621.9
Paper PCC		74.5		90.2		225.1		271.9
Specialty PCC		17.3		17.7		49.7		53.1
Ground Calcium Carbonate		23.2		23.0		66.4		70.1
Talc		10.1		12.2		30.8		37.5
Specialty Minerals		125.1		143.1		372.0		432.6
Refractory Products		48.8		61.3		151.7		184.3
Metallurgical Products		10.5		12.1		32.5		40.4
Refractories		59.3		73.4		184.2		224.7
Energy Services		13.3		25.5		56.2		71.6
Total	$	388.3	$	449.3	$	1,163.0	$	1,350.8