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Fair Value Disclosures (Tables)
6 Months Ended
Jun. 30, 2011
Fair Value Disclosures  
Non-Pension Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis
Fair Value Of Certain Short And Long-Term Debt, Based On Market Prices
     June 30, 2011      December 31, 2010  
     Fair Value      Book Value      Fair Value      Book Value  

Medium-term notes

       $ 1,673.4       $ 1,622.2       $ 1,650.7       $ 1,623.0       

Preferred securities underlying the junior convertible subordinated debentures

     396.0         421.2         353.8         421.2       
Non-Recurring Fair Value Measurements
Fair Value Of Financial Instruments

The Company's financial instruments include cash and cash equivalents, accounts receivable, accounts payable, derivative instruments, notes payable and short and long-term debt. The carrying values for current financial assets and liabilities, including cash and cash equivalents, accounts receivable and accounts payable, approximate fair value due to the short maturity of such instruments. The fair values of the Company's derivative instruments are recorded in the Condensed Consolidated Balance Sheets and are disclosed in Footnote 6. The fair values of certain of the Company's short and long-term debt are based on quoted market prices and are as follows (in millions):