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FAIR VALUE MEASUREMENTS (Tables)
3 Months Ended
Mar. 31, 2012
FAIR VALUE MEASUREMENTS [Abstract]  
Summary of fair value instruments
The following tables categorize our fair value instruments, measured on a recurring basis, according to the assumptions used to calculate those values:

      
Fair Value Measurements Using
 
      
Quoted Prices in Active Markets for Identical Assets
  
Significant Other Observable Inputs
  
Significant Unobservable Inputs
 
Description
 
Asset / (Liability) Balance at
 
   
3/31/2012
  
(Level 1)
  
(Level 2)
  
(Level 3)
 
              
Interest rate swaps
 $(8.7) $-  $(8.7) $- 
                  
Available-for-sale securities
  2.9   2.9   -   - 
                  
Deferred compensation plan assets
  9.0   -   9.0   - 
                  
Supplementary pension plan assets
  8.1   -   8.1   - 

      
Fair Value Measurements Using
 
      
Quoted Prices in Active Markets for Identical Assets
  
Significant Other Observable Inputs
  
Significant Unobservable Inputs
 
Description
 
Asset / (Liability) Balance at
 
   
12/31/2011
  
(Level 1)
  
(Level 2)
  
(Level 3)
 
              
Interest rate swaps
 $(9.0) $-  $(9.0) $- 
                  
Available-for-sale securities
  3.8   3.8   -   - 
                  
Deferred compensation plan assets
  8.0   -   8.0   - 
                  
Supplementary pension plan assets
  7.6   -   7.6   -