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Share-Based Compensation Plans - Restricted Stock Unit Activity (Details) - $ / shares
shares in Thousands
12 Months Ended
Feb. 28, 2022
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2019
Number of Service Condition Awards        
Granted (in shares)       68
Weighted Average Grant Date Fair Value (per share)        
Target achievement as a percentage 175.00%      
Restricted Stock Awards and Restricted Stock Units        
Number of Service Condition Awards        
Forfeited (in shares) (16)      
Weighted Average Grant Date Fair Value (per share)        
Forfeited (in dollars per share) $ 192.26      
Performance Shares        
Number of Service Condition Awards        
Outstanding at the beginning of the period (in shares) 470      
Granted (in shares) 140      
Vested (in shares) (134)      
Forfeited (in shares) (25)      
Outstanding at the end of the period (in shares) 451 470    
Weighted Average Grant Date Fair Value (per share)        
Outstanding at the beginning of the period (in dollars per share) $ 129.53      
Granted (in dollars per share) 216.20 $ 170.27 $ 111.98  
Vested (in dollars per share) 86.25      
Forfeited (in dollars per share) 148.16      
Outstanding at the end of the period (in dollars per share) $ 148.66 $ 129.53    
Target percentage for performance stock awards 200.00% 200.00% 200.00%  
Market Condition Awards        
Number of Service Condition Awards        
Outstanding at the beginning of the period (in shares) 0      
Granted (in shares) 72      
Forfeited (in shares) (4)      
Outstanding at the end of the period (in shares) 68 0    
Weighted Average Grant Date Fair Value (per share)        
Outstanding at the beginning of the period (in dollars per share) $ 0      
Granted (in dollars per share) 156.08      
Forfeited (in dollars per share) 156.08      
Outstanding at the end of the period (in dollars per share) $ 156.08 $ 0    
Target achievement as a percentage 100.00%      
2008 Stock Incentive Plan | Restricted Stock Awards and Restricted Stock Units        
Number of Service Condition Awards        
Outstanding at the beginning of the period (in shares) 126      
Granted (in shares) 93      
Vested (in shares) (65)      
Outstanding at the end of the period (in shares) 138 126    
Weighted Average Grant Date Fair Value (per share)        
Outstanding at the beginning of the period (in dollars per share) $ 129.52      
Granted (in dollars per share) 218.35      
Vested (in dollars per share) 116.22      
Outstanding at the end of the period (in dollars per share) $ 188.11 $ 129.52    
2008 Stock Incentive Plan | Performance Shares        
Number of Service Condition Awards        
Vested (in shares) (68)      
2008 Stock Incentive Plan | Market Condition Awards        
Number of Service Condition Awards        
Vested (in shares) 0      
Weighted Average Grant Date Fair Value (per share)        
Vested (in dollars per share) $ 0