A summary of inventories by major category at December 31, 2016 and 2015 follows:
 
 
2016
 
2015
Raw materials
 
$
274.1

 
$
201.3

Work in process
 
87.2

 
120.0

Finished goods
 
136.6

 
122.1

Total
 
$
497.9

 
$
443.4