Inventories (Tables)

12 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

The major components of inventory, on a net basis, were as follows:

	December 31,
($ amounts in millions)	2017			2016
Finished goods	$	328.9		$	273.8
Work in process	28.8			37.1
Raw materials and supplies	149.8			135.9
Total inventory, net	507.5			446.8
Non-current inventory, net	(17.0		)	(30.4		)
Current inventory, net	$	490.4		$	416.4