Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of inventories

Inventories consisted of the following:

	December 31,
	2017		2016
	(in millions)
Finished goods	$	3.5	$	6.8
Raw materials, spare parts and supplies	1.8		1.8
Total	$	5.3	$	8.6