Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory, Net [Abstract]

Schedule Of Inventory

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

	2017		2016
Finished goods	$	982.5	$	884.4
Work in process	309.7		299.4
Raw materials	548.6		525.6
Total	$	1,840.8	$	1,709.4