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Goodwill and Other Intangible Assets (Tables)
 9 Months Ended
Sep. 27, 2020
Goodwill and Other Intangible Assets [Abstract]  
Intangible Assets Subject to Amortization

Intangible assets subject to amortization as of September 27, 2020 and December 31, 2019 were as follows:

        
September 27, 2020
    
December 31, 2019
  
(millions of dollars)
  
Weighted Average
Useful Life
(Years)
    
Gross
Carrying
Amount
    
Accumulated
Amortization
    
Gross
Carrying
Amount
    
Accumulated
Amortization
  
Tradenames
    
35
    
$
203.9
    
$
37.1
    
$
203.9
    
$
32.5
  
Technology
    
13
      
18.8
      
9.2
      
18.8
      
8.0
  
Patents and trademarks
    
19
      
6.4
      
6.1
      
6.4
      
5.9
  
Customer relationships
    
22
      
25.6
      
5.3
      
24.7
      
4.4
  
     
32
    
$
254.7
    
$
57.7
    
$
253.8
    
$
50.8