Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Schedule of 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, 2021		December 31, 2020
Raw materials	$	130.2	$	133.5
Work in process	65.8		54.9
Finished goods	149.2		132.9
	$	345.2	$	321.3