INVENTORIES (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2016

Dec. 31, 2015

Inventory Disclosure [Abstract]

Inventories Table

Inventories consisted of the following:

	March 31, 2016			December 31, 2015			March 31, 2015
	($ in millions)
Supplies	$	73.7		$	86.5		$	40.2
Raw materials	88.0			91.5			63.6
Work in process	108.1			105.8			37.2
Finished goods	452.2			445.3			141.1
	722.0			729.1			282.1
LIFO reserve	(42.5		)	(43.9		)	(66.0		)
Inventories, net	$	679.5		$	685.2		$	216.1

	December 31,
	2015			2014
	($ in millions)
Supplies	$	86.5		$	39.2
Raw materials	91.5			63.3
Work in process	105.8			31.8
Finished goods	445.3			141.5
	729.1			275.8
LIFO reserves	(43.9		)	(65.7		)
Inventories, net	$	685.2		$	210.1