Inventories (Tables)

3 Months Ended

Mar. 31, 2017

Inventory Disclosure [Abstract]

Schedule of Inventories by Major Class

The following schedule details inventories by major class ($ in millions):

	March 31, 2017		December 31, 2016
Raw materials	$	49.7	$	40.9
Work in process	21.5		23.9
Finished goods	54.7		44.9
Supplies and other	10.9		9.7
Total	$	136.8	$	119.4