Stock And Stock-Based Incentive Plans (Composition Of Share-Based Compensation Expense - By Grant Type) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
May 31, 2014
May 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes $ 15,719 $ 23,229
Stock Options [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes 8,120 7,033
Cash-Settled Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes 3,147 12,088
Stock-Settled Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes 4,121 3,820
Employee Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes 331 288
Stock Grants To Non-Employee Directors [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense, before income taxes $ 0 $ 0