INVENTORIES (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories Table

	December 31,
	2017			2016
	($ in millions)
Supplies	$	66.1		$	58.1
Raw materials	75.3			72.6
Work in process	127.8			110.7
Finished goods	462.6			424.9
	731.8			666.3
LIFO reserves	(49.2		)	(35.9		)
Inventories, net	$	682.6		$	630.4