Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventories [Abstract]

Inventories by major category

The following is a summary of inventories by major category:

	2017		2016
	(millions of dollars)
Raw materials	$	82.5	$	70.6
Work-in-process		7.9		5.4
Finished goods		92.3		80.5
Packaging and supplies		36.6		30.4
Total inventories	$	219.3	$	186.9