XML 52 R37.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventories (Tables)
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories by Major Class
The following schedule details inventories by major class ($ in millions):
 
December 31,
 
2017
 
2016
Raw materials
$
50.4

 
$
40.9

Work in process
21.3

 
23.9

Finished goods
74.2

 
44.9

Supplies and other
9.3

 
9.7

Total
$
155.2

 
$
119.4