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Fair Value Measurements and Other Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2011
Fair Value Measurements and Other Financial Instruments [Abstract]  
Fair value measurements
                                 
    Total                    
June 30, 2011   Fair Value     Level 1     Level 2     Level 3  
Cash equivalents
  $ 9.4     $     $ 9.4     $  
 
                       
Derivative financial instruments net asset:
                               
Interest rate swaps
  $ 7.7     $     $ 7.7     $  
 
                       
Derivative financial instruments net liability:
                               
Foreign currency forward contracts
  $ 1.6     $     $ 1.6     $  
 
                       
                                 
    Total                    
December 31, 2010   Fair Value     Level 1     Level 2     Level 3  
Cash equivalents
  $ 163.4     $ 53.4     $ 110.0     $  
 
                       
Derivative financial instruments net asset:
                               
Interest rate swaps
  $ 5.8     $     $ 5.8     $  
 
                       
Derivative financial instruments net liability:
                               
Foreign currency forward contracts
  $ 0.2     $     $ 0.2     $  
 
                       
Carrying amount and estimated fair values of debt
                                 
    June 30, 2011     December 31, 2010  
    Carrying     Fair     Carrying     Fair  
    Amount     Value     Amount     Value  
5.625% Senior Notes due July 2013(1)
  $ 400.7     $ 418.2     $ 399.4     $ 423.1  
12% Senior Notes due February 2014(1)
    156.6       171.6       156.0       196.5  
7.875% Senior Notes due June 2017
    393.1       429.0       392.6       438.8  
6.875% Senior Notes due July 2033
    448.6       397.7       448.5       415.1  
Other foreign loans
    12.4       12.1       26.2       26.0  
Other domestic loans
    2.2       2.1       6.5       6.5  
 
                       
Total debt
  $ 1,413.6     $ 1,430.7     $ 1,429.2     $ 1,506.0  
 
                       
 
(1)   The carrying value and fair value of such debt include adjustments due to interest rate swaps. See Note 10, “Derivatives and Hedging Activities.”