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Stock And Stock-Based Incentive Plans (Cash-Settled Restricted Stock Unit Activity) (Details) (Cash-Settled Restricted Stock Units [Member], USD $)
6 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Cash-Settled Restricted Stock Units [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding at beginning of year, Number of Shares or Units 1,531,000  
Stock units granted, Number of Units 587,511 541,819
Stock units vested and converted, Number of Units (463,000)  
Stock units cancelled, Number of Units (65,000)  
Outstanding at end of year, number of shares or Units 1,591,000  
Outstanding as of February 28, 2014, Weighted Average Grant Date Fair Value $ 35.68  
Restricted stock granted, weighted average grant date fair value $ 44.96 $ 42.68
Stock units vested and converted, Weighted Average Grant Date Fair Value $ 32.77  
Stock units cancelled, Weighted Average Grant Date Fair Value $ 38.86  
Outstanding as of August 31, 2014, Weighted Average Grant Date Fair Value $ 39.82