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Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Nov. 30, 2013
Nov. 30, 2013
Nov. 30, 2012
Share Repurchase Program [Member]
     
Stock and Stock-Based Incentive Plans      
Shares repurchased during the period 313,042 4,305,293 1,744,300
Share repurchase, average purchase price per share $ 47.39 $ 43.69 $ 34.53
Share repurchase, amount remaining for repurchase   $ 400.0  
Share Repurchase Program [Member] | FY 2013 Share Repurchase Authorizations Member
     
Stock and Stock-Based Incentive Plans      
Share repurchase, authorized amount   800  
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   1,605,149 2,252,124
Cash received as a result of stock option exercises   26.0 37.8
Total intrinsic value of options exercised   34.7 37.7
Related tax benefits   13.9 15.1
Options granted, weighted average grant date fair value   $ 15.59 $ 12.67
Unrecognized compensation costs related to nonvested options/MSUs 37.8 37.8  
Weighted average period, years   2 years 2 months 12 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   541,819 644,232
Stock units granted, weighted average grant date fair value   $ 42.68 $ 31.76
Related tax benefits   9.3 7.2
Payment related to restricted stock units vested during the period   23.3 18.0
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   237,660 348,551
Stock units granted, weighted average grant date fair value   $ 52.02 $ 40.33
Related tax benefits   6.7 9.5
Unrecognized compensation costs related to nonvested options/MSUs $ 16.2 $ 16.2  
Weighted average period, years   1 year 3 months 18 days  
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