Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $)
3 Months Ended
May 31, 2014
May 31, 2013
Feb. 28, 2014
FY 2015 Share Repurchase Authorization Member
     
Stock and Stock-Based Incentive Plans      
Share repurchase, authorized amount $ 1,000,000,000    
Share Repurchase Program [Member]
     
Stock and Stock-Based Incentive Plans      
Shares repurchased during the period 3,841,939 2,945,622  
Share repurchase, average purchase price per share $ 45.33 $ 42.29  
Share repurchase, amount remaining for repurchase 1,100,000,000    
Share Repurchase Program [Member] | FY 2013 Share Repurchase Authorizations Member
     
Stock and Stock-Based Incentive Plans      
Share repurchase, authorized amount 800,000,000    
Stock Compensation Plan [Member]
     
Stock and Stock-Based Incentive Plans      
Incentive stock option grants in period 0    
Capitalized share-based compensation 0 0  
Stock Option [Member]
     
Stock and Stock-Based Incentive Plans      
Options granted, Number of Shares 2,003,238 1,569,117  
Cash received as a result of stock option exercises 6,800,000 17,000,000  
Total intrinsic value of options exercised 10,600,000 23,400,000  
Related tax benefits 4,200,000 9,400,000  
Options granted, weighted average grant date fair value $ 13.21 $ 15.55  
Unrecognized compensation costs related to nonvested options/MSUs 50,600,000    
Weighted average period, years 2 years 7 months 6 days    
Stock Option [Member] | Minimum [Member]
     
Stock and Stock-Based Incentive Plans      
Vesting period, in years 1 year    
Stock Option [Member] | Maximum [Member]
     
Stock and Stock-Based Incentive Plans      
Vesting period, in years 4 years    
Years until expiration 10 years    
Cash-Settled Restricted Stock Units [Member]
     
Stock and Stock-Based Incentive Plans      
Vesting period, in years 3 years    
Stock units granted, number of units or shares 587,186 541,741  
Stock units granted, weighted average grant date fair value $ 44.96 $ 42.68  
Related tax benefits 8,400,000 9,000,000  
Payment related to restricted stock units vested during the period 21,100,000 22,700,000  
Awards outstanding 1,631,000   1,531,000
Cash-Settled Restricted Stock Units [Member] | Minimum [Member]
     
Stock and Stock-Based Incentive Plans      
Cash payment per RSU, percentage 75.00%    
Cash-Settled Restricted Stock Units [Member] | Maximum [Member]
     
Stock and Stock-Based Incentive Plans      
Cash payment per RSU, percentage 200.00%    
Stock-Settled Restricted Stock Units [Member]
     
Stock and Stock-Based Incentive Plans      
Vesting period, in years 3 years    
Conversion ratio, number of final trading days in vesting period 40 days    
Stock units granted, number of units or shares 245,190 235,459  
Stock units granted, weighted average grant date fair value $ 55.37 $ 51.95  
Related tax benefits 7,100,000 6,800,000  
Unrecognized compensation costs related to nonvested options/MSUs $ 22,400,000    
Weighted average period, years 1 year 7 months 6 days    
Awards outstanding 816,000   852,000
Stock-Settled Restricted Stock Units [Member] | Minimum [Member]
     
Stock and Stock-Based Incentive Plans      
MSUs converted to common stock 0    
Stock-Settled Restricted Stock Units [Member] | Maximum [Member]
     
Stock and Stock-Based Incentive Plans      
MSUs converted to common stock 2