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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2013
Fair Value Measurements [Abstract]  
Summary of fair value instruments
The following table categorizes our fair value instruments according to the assumptions used to calculate those values at the end of each of the past two years:
 
               Fair Value Measurements Using 
Description 
Asset / (Liability)
  
Quoted Prices in
Active Markets for
  Significant Other  
Significant
Unobservable
 
     
Balance at
    Identical Assets    
Observable Inputs
   
Inputs
 
    
12/31/2013
   
(Level 1)
  
(Level 2)
   
(Level 3)
    
Interest rate swaps
 
$
(5.8
)
 
$
-
  
$
(5.8
)
 
$
-
 
 
                
Deferred compensation plan assets
  
11.9
   
-
   
11.9
   
-
 
 
                
Supplementary pension plan assets
  
9.4
   
-
   
9.4
   
-
 
                                       
 
               Fair Value Measurements Using  
    Asset /  Quoted Prices in   
Significant
 
Description 
(Liability)
 
Active Markets for
 Significant Other  
Unobservable
 
    
Balance at
 Identical Assets 
Observable Inputs
 
Inputs
 
      
12/31/2012
   (Level 1)   (Level 2)   (Level 3) 
Interest rate swaps
 
$
(8.4
)
 
$
-
  
$
(8.4
)
 
$
-
 
 
                
Available-for-sale securities
  
14.6
   
14.6
   
-
   
-
 
 
                
Deferred compensation plan assets
  
9.4
   
-
   
9.4
   
-
 
 
                
Supplementary pension plan assets
  
8.2
   
-
   
8.2
   
-