Inventories

6 Months Ended

Jun. 30, 2017

Inventory Disclosure [Abstract]

Inventories

Inventories

The components of inventories as of June 30, 2017 and December 31, 2016 are summarized as follows:

($ in millions)	June 30, 2017			December 31, 2016
Inventories:
Raw materials	$	123.9		$	109.3
Work-in-process	127.9			88.4
Finished goods	269.1			270.9
Total inventories	520.9			468.6
Excess and obsolete inventory reserve	(44.7		)	(39.6		)
Inventories — net	$	476.2		$	429.0

In the fourth quarter of 2016, the Company changed its method of inventory costing from LIFO to FIFO for certain of its inventory. See footnote 1 for further information.