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Inventories (Tables)
 9 Months Ended
Oct. 02, 2016
Inventories [Abstract]  
Inventories by major category
The following is a summary of inventories by major category:

  
October 2,
  
December 31,
 
  
2016
  
2015
 
  
(millions of dollars)
 
   
Raw materials
 
$
81.3
  
$
73.4
 
Work-in-process
  
5.8
   
5.4
 
Finished goods
  
91.1
   
86.1
 
Packaging and supplies
  
30.9
   
30.0
 
Total inventories
 
$
209.1
  
$
194.9