Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.2
Stockholders' Equity (Details) - shares
 3 Months Ended
May 31, 2019
May 31, 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  
Common Stock, end of period 185,873,845  
Treasury Stock, end of period 18,636,987  
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 28,322,364  
Treasury Stock, end of period 5,005,800  
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
Conversion of shares 133,667 5,144
Exercise of stock options 0 216,946
Common Stock, end of period 185,873,845 258,940,446
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
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
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
Conversion of shares (55) (5,144)
Exercise of stock options 0 0
Common Stock, end of period 28,322,364 28,330,243
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
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
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
Conversion of shares (133,612) 0
Exercise of stock options 2,107 5,118
Common Stock, end of period 1,018,119 7,088
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
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
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
Conversion of shares 0 0
Exercise of stock options (173,725) 0
Treasury Stock, end of period 18,636,987 91,111,003
Share repurchases   450,508
Treasury Stock [Member] | Class A Common Stock [Member] | Restricted stock units [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Vesting of stock units (88,683) (20,392)
Shares withheld to satisfy tax withholding requirements 48,562 12,743
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)
Shares withheld to satisfy tax withholding requirements 17,439 44,016
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
Conversion of shares 0 0
Exercise of stock options 0 0
Treasury Stock, end of period 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
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
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted shares [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Cancellation of restricted shares 0