Inventories

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories

Inventories

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

($ in millions)	September 30, 2018		December 31, 2017
Raw materials	$	93.3	$	88.6
Work in process	38.0		31.8
Finished goods	75.5		94.8
	$	206.8	$	215.2