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Comprehensive Income (Tables)
 6 Months Ended
Jul. 01, 2012
Comprehensive Income [Abstract]  
Accumulated other comprehensive income, net of related tax
     The components of accumulated other comprehensive gain (loss), net of related tax, are as follows:

(millions of dollars)
 
July 1,
2012
     
December 31,
2011
 
Foreign currency translation adjustments
$
23.2
   
$
29.9
 
Unrecognized pension costs
 
(73.9
)
   
(77.5
)
Net gain on cash flow hedges
 
3.0
     
2.3
 
Accumulated other comprehensive gain (loss)
$
(47.7
)
 
$
(45.3
)