Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.20.1
Stockholders' Equity (Details) - shares
 12 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 185,740,178    
Treasury Stock, beginning of period 18,927,966    
Share repurchases 265,593 2,352,145 4,810,061
Common Stock, end of period 186,090,745 185,740,178  
Treasury Stock, end of period 18,256,826 18,927,966  
Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 28,322,419    
Treasury Stock, beginning of period 5,005,800    
Common Stock, end of period 28,300,206 28,322,419  
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 1,149,624    
Common Stock, end of period 1,692,227 1,149,624  
Common Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 185,740,178 258,718,356 257,506,184
Share repurchases 0 0 0
Conversion of shares 350,567 12,968 29,640
Exercise of stock options 0 1,008,854 1,182,532
Employee stock purchases 0 0 0
Grant of restricted stock awards   0 0
Common Stock, end of period 186,090,745 185,740,178 258,718,356
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 A Common Stock [Member] | Restricted shares [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cancellation of restricted shares 0    
Common Stock [Member] | Class B Convertible Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 28,322,419 28,335,387 28,358,527
Share repurchases 0 0 0
Conversion of shares (22,213) (12,968) (23,140)
Exercise of stock options 0 0 0
Employee stock purchases 0 0 0
Grant of restricted stock awards   0 0
Common Stock, end of period 28,300,206 28,322,419 28,335,387
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 B Convertible Common Stock [Member] | Restricted shares [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cancellation of restricted shares 0    
Common Stock [Member] | Class 1 Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Common Stock, beginning of period 1,149,624 1,970 2,080
Share repurchases 0 0 0
Conversion of shares (328,354) 0 (6,500)
Exercise of stock options 870,957 1,147,654 6,390
Employee stock purchases 0 0 0
Grant of restricted stock awards   0 0
Common Stock, end of period 1,692,227 1,149,624 1,970
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
Common Stock [Member] | Class 1 Common Stock [Member] | Restricted shares [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cancellation of restricted shares 0    
Treasury Stock [Member] | Class A Common Stock [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Treasury Stock, beginning of period 18,927,966 90,743,239 86,262,971
Share repurchases 265,593 2,352,145 4,810,061
Conversion of shares 0 0 0
Exercise of stock options (747,527) 0 0
Employee stock purchases (69,324) (76,844) (75,023)
Grant of restricted stock awards   (3,914) (3,848)
Treasury Stock, end of period 18,256,826 18,927,966 90,743,239
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 (91,311) (24,308) (181,994)
Shares withheld to satisfy tax withholding requirements 49,900 15,409 117,188
Treasury Stock [Member] | Class A Common Stock [Member] | Performance share units [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Vesting of stock units (29,015) (62,352) (68,928)
Shares withheld to satisfy tax withholding requirements 17,439 44,016 55,584
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted shares [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cancellation of restricted shares 444    
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
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
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted shares [Member]      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Cancellation of restricted shares 0