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
6 Months Ended
Aug. 31, 2012
Aug. 31, 2011
AFS Debt Securities [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation    
Balance as of March 1 $ 28.5 $ 40.8
Total net gains (losses)    
Included in earnings (interest expense, net) 2.4 3.1
Included in other comprehensive income (net unrealized losses on AFS debt securities) 0 (0.2)
Total net gains 2.4 2.9
Balance as of the end of the period $ 30.9 $ 43.7