Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories [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:

	March 31,		December 31,
($ in millions)	2012		2011
Finished goods	$	69.2	$	67.1
Work in process		22.5		19.6
Raw materials		66.5		65.1
	$	158.2	$	151.8