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Restructuring Charges (Tables)
3 Months Ended
Mar. 29, 2015
Restructuring Charges [Abstract]  
Reconciliation of restructuring liability
The following table is a reconciliation of our restructuring liability balance as of March 29, 2014:
  
(millions of dollars)
 
Restructuring liability, December 31, 2014
 
$
14.6
 
Additional provisions
  
-
 
Cash payments
  
(2.9
)
Restructuring liability,  March 29, 2015
 
$
11.7