Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventory Disclosure [Abstract]

Inventories

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

($ in millions)	March 31, 2013		December 31, 2012
Finished goods	$	74.6	$	70.9
Work in process	27.1		23.6
Raw materials	71.8		67.7
	$	173.5	$	162.2