Inventories (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Components of Inventory

The components of inventories were as follows:

(in millions of dollars)	March 31, 2018		December 31, 2017
Raw materials	$	45.3	$	38.2
Work in process	4.5		4.1
Finished goods	244.7		211.9
Total inventories	$	294.5	$	254.2