Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.4.0.3
Stockholders' Equity (Details) - shares
 12 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 28, 2014
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Exercise of stock options 4,689,588 2,527,458 6,119,923
Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 250,839,359    
Treasury Stock, beginning of period 79,681,859    
Common Stock, end of period 255,558,026 250,839,359  
Treasury Stock, end of period 79,454,011 79,681,859  
Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 28,389,608    
Treasury Stock, beginning of period 5,005,800    
Common Stock, end of period 28,358,529 28,389,608  
Treasury Stock, end of period 5,005,800 5,005,800  
Class 1 Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 0    
Common Stock, end of period 2,000 0  
Common Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 250,839,359 248,264,944 242,064,514
Conversion of shares 31,079 46,957 80,507
Exercise of stock options 4,687,588 2,527,458 6,119,923
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Cancellation of restricted shares 0 0 0
Common Stock, end of period 255,558,026 250,839,359 248,264,944
Share repurchases 0    
Common Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Common Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Common Stock [Member] | Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 28,389,608 28,436,565 28,517,035
Conversion of shares (31,079) (46,957) (80,470)
Exercise of stock options 0 0 0
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Cancellation of restricted shares 0 0 0
Common Stock, end of period 28,358,529 28,389,608 28,436,565
Share repurchases 0    
Common Stock [Member] | Class B Convertible Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Common Stock [Member] | Class B Convertible Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Common Stock [Member] | Class 1 Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 0 0 37
Conversion of shares 0 0 (37)
Exercise of stock options 2,000 0 0
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Cancellation of restricted shares 0 0 0
Common Stock, end of period 2,000 0 0
Share repurchases 0    
Common Stock [Member] | Class 1 Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Common Stock [Member] | Class 1 Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Treasury Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Treasury Stock, beginning of period 79,681,859 80,225,575 80,799,298
Conversion of shares 0 0 0
Exercise of stock options 0 0 0
Employee stock purchases (89,155) (117,301) (163,817)
Grant of restricted stock awards (4,984) (6,424) (12,375)
Cancellation of restricted shares 244 8,426 33,661
Treasury Stock, end of period 79,454,011 79,681,859 80,225,575
Share repurchases 246,143    
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units (157,052) (140,396) (121,539)
Shares withheld to satisfy tax withholding requirements 112,851 101,499 96,767
Treasury Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units (223,044) (288,021) (309,653)
Shares withheld to satisfy tax withholding requirements 216,396 248,499 267,577
Treasury Stock [Member] | Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Treasury Stock, beginning of period 5,005,800 5,005,800 5,005,800
Conversion of shares 0 0 0
Exercise of stock options 0 0 0
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Cancellation of restricted shares 0 0 0
Treasury Stock, end of period 5,005,800 5,005,800 5,005,800
Share repurchases 0    
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units 0 0 0