Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

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Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Nov. 30, 2011
Feb. 28, 2011
Nov. 30, 2010
Feb. 28, 2010
Assets:        
Cash and cash investments, Carrying Amount $ 55.8 $ 9.2 $ 16.0 $ 43.5
Cash and cash investments, Fair Value 55.8 9.2    
Accounts receivable, Carrying Amount 567.2 416.2    
Accounts receivable, Fair Value 567.7 416.2    
Available-for-sale debt securities, Carrying Amount 25.1 40.8    
Available-for-sale debt securities, Fair Value 25.1 40.8    
Foreign currency contracts, Carrying Amount 13.7 17.0    
Foreign currency contracts, Fair Value 13.7 17.0    
Interest rate swap contracts, Carrying Amount 0 1.7    
Interest rate swap contracts, Fair Value 0 1.7    
Notes receivable, Carrying Amount 4.9 6.0    
Notes receivable, Fair Value 4.9 6.0    
Liabilities:        
Notes payable to banks 352.3 83.7    
Notes payable to banks, Fair Value 348.1 83.8    
Accounts payable, Carrying Amount 270.6 129.2    
Accounts payable, Fair Value 270.6 129.2    
Long-term debt, including current portion, Carrying Amount 2,752.3 3,152.6    
Long-term debt, including current portion, Fair Value 2,934.8 3,298.2    
Foreign currency contracts, Carrying Amount 6.5 5.3    
Foreign currency contracts, Fair Value 6.5 5.3    
Interest rate swap contracts, Carrying Amount 42.8 6.1    
Interest rate swap contracts, Fair Value $ 42.8 $ 6.1