Inventories

9 Months Ended

Sep. 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)	September 30, 2020		December 31, 2019
Raw materials	$	125.4	$	100.9
Work in process	55.8		37.4
Finished goods	113.7		97.4
	$	294.9	$	235.7