Inventories

6 Months Ended

Jun. 30, 2020

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)	June 30, 2020		December 31, 2019
Raw materials	$	112.7	$	100.9
Work in process	49.0		37.4
Finished goods	113.1		97.4
	$	274.8	$	235.7