Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details 2)

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Fair Value of Financial Instruments (Details 2) (AFS Debt Securities [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
May 31, 2012
May 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Balance as of March 1 $ 28.5 $ 40.8
Total net gains    
Included in earnings (interest expense, net) 1.2 1.5
Total net (losses) gains (1.1) 3.1
Balance as of the end of the period 27.4 43.9
Accumulated Net Unrealized Investment Gain (Loss) [Member]
   
Total net gains    
Included in other comprehensive income (2.3)  
Accumulated Translation Adjustment [Member]
   
Total net gains    
Included in other comprehensive income   $ 1.6