XML 84 R70.htm IDEA: XBRL DOCUMENT v3.6.0.2
Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Finished goods $ 151.7 $ 114.5
Raw materials and precious metals 98.4 81.2
In-process inventories 23.9 35.8
Parts and supplies 75.2 58.4
Total Inventories $ 349.2 $ 289.9