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Earnings per Share (Details) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended
May 31, 2014
May 31, 2013
Weighted average diluted securities    
Weighted average shares outstanding, basic 29,105 31,908
Incremental shares from share-based payment arrangements 511 272
Weighted average shares outstanding, diluted 29,616 32,180
Former CEO | Separation Agreement
   
Dilutive securities, in-the-money and/or unvested    
Severance payment to be settled with common stock $ 15  
Options
   
Dilutive securities, in-the-money and/or unvested    
Dilutive securities (in shares) 728 199
Restricted share awards
   
Dilutive securities, in-the-money and/or unvested    
Dilutive securities (in shares) 231 234