Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory

The classes of inventory as of December 31 are summarized as follows ($ in millions):

	2020		2019
Finished goods	$	219.0	$	223.5
Work in process	39.8		36.5
Raw materials	93.7		89.9
Reserve for inventory obsolescence	$	(85.6)	$	(72.0)
Total	$	266.9	$	277.9