Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.19.1
Stockholders' Equity (Details) - shares
 12 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2017
Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 258,718,356    
Treasury Stock, beginning of period 90,743,239    
Share repurchases 2,352,145 4,810,061 7,407,051
Common Stock, end of period 185,740,178 258,718,356  
Treasury Stock, end of period 18,927,966 90,743,239  
Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 28,335,387    
Treasury Stock, beginning of period 5,005,800    
Common Stock, end of period 28,322,419 28,335,387  
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 1,970    
Common Stock, end of period 1,149,624 1,970  
Common Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 258,718,356 257,506,184 255,558,026
Share repurchases 0 0 0
Conversion of shares 12,968 29,640 2
Exercise of stock options 1,008,854 1,182,532 1,948,156
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Common Stock, end of period 185,740,178 258,718,356 257,506,184
Retirement of treasury shares (74,000,000)    
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 28,335,387 28,358,527 28,358,529
Share repurchases 0 0 0
Conversion of shares (12,968) (23,140) (2)
Exercise of stock options 0 0 0
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Common Stock, end of period 28,322,419 28,335,387 28,358,527
Retirement of treasury shares 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 1,970 2,080 2,000
Share repurchases 0 0 0
Conversion of shares 0 (6,500) 0
Exercise of stock options 1,147,654 6,390 80
Employee stock purchases 0 0 0
Grant of restricted stock awards 0 0 0
Common Stock, end of period 1,149,624 1,970 2,080
Retirement of treasury shares 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 90,743,239 86,262,971 79,454,011
Share repurchases 2,352,145 4,810,061 7,407,051
Conversion of shares 0 0 0
Exercise of stock options 0 0 0
Employee stock purchases (76,844) (75,023) (77,671)
Grant of restricted stock awards (3,914) (3,848) (4,088)
Treasury Stock, end of period 18,927,966 90,743,239 86,262,971
Retirement of treasury shares (74,000,000)    
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units (24,308) (181,994) (325,773)
Shares withheld to satisfy tax withholding requirements 15,409 117,188 241,870
Treasury Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units (62,352) (68,928) (190,559)
Shares withheld to satisfy tax withholding requirements 44,016 55,584 168,811
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
Share repurchases 0 0 0
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
Treasury Stock, end of period 5,005,800 5,005,800 5,005,800
Retirement of treasury shares 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