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Other Comprehensive Earnings (Tables)
6 Months Ended
Jul. 01, 2012
Other Comprehensive Earnings (Thousands of Dollars) [Abstract]  
Schedule of comprehensive earnings (loss)
 
Pension and Postretirement Amounts
Gains (Losses) on Derivative Instruments
Foreign Currency Translation Adjustments
Total Accumulated Other Comprehensive Earnings (Loss)
2012
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Balance at Dec. 25, 2011
$   (86,822)                
10,081            
40,798             
(35,943)                 
Current period other
comprehensive earnings (loss)
 
-                 
 
4,207            
 
(7,907)           
 
(3,700)                 
 
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Balance at July 1, 2012
$   (86,822)                
14,288            
32,891            
(39,643)                 
 
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2011
       
Balance at Dec. 26, 2010
$   (69,925)                
15,432            
62,642           
8,149                  
Current period other
comprehensive earnings (loss)
 
-                 
       
(37,002)          
 
33,022           
 
(3,980)                 
 
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Balance at June 26, 2011
$   (69,925)                
(21,570)          
95,664           
4,169                  
 
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