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
May 31, 2012
Feb. 29, 2012
May 31, 2011
Feb. 28, 2011
Assets:        
Cash and cash investments, Carrying Amount $ 69.1 $ 85.8 $ 13.4 $ 9.2
Cash and cash investments, Fair Value 69.1 85.8    
Accounts receivable, Carrying Amount 457.8 436.0    
Accounts receivable, Fair Value 457.8 436.0    
Available-for-sale debt securities, Carrying Amount 27.4 28.5    
Available-for-sale debt securities, Fair Value 27.4 28.5    
Foreign currency contracts, Carrying Amount 9.9 13.2    
Foreign currency contracts, Fair Value 9.9 13.2    
Interest rate swap contracts, Carrying Amount 2.3      
Interest rate swap contracts, Fair Value 2.3      
Notes receivable, Carrying Amount   1.6    
Notes receivable, Fair Value   1.6    
Liabilities:        
Notes payable to banks 97.9 377.9    
Notes payable to banks, Fair Value 98.7 377.6    
Accounts payable, Carrying Amount 117.2 130.5    
Accounts payable, Fair Value 117.2 130.5    
Long-term debt, including current portion, Carrying Amount 3,323.1 2,751.6    
Long-term debt, including current portion, Fair Value 3,580.1 3,007.9    
Foreign currency contracts, Carrying Amount 10.9 6.4    
Foreign currency contracts, Fair Value 10.9 6.4    
Interest rate swap contracts, Carrying Amount 49.5 45.7    
Interest rate swap contracts, Fair Value $ 49.5 $ 45.7