Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Inventories

Inventories are valued at the lower of cost (on a first-in, first-out basis) or market. Inventory balances were as follows:

($ in millions)	March 31, 2016		December 31, 2015
Raw materials	$	76.1	$	74.4
Work in process	33.6		30.1
Finished goods	84.4		76.6
	$	194.1	$	181.1