Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

v3.19.3.a.u2
Stockholders' Equity (Details) - shares
 3 Months Ended 9 Months Ended
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Nov. 30, 2018
Aug. 31, 2018
May 31, 2018
Nov. 30, 2019
Nov. 30, 2018
Class A Common Stock [Member]                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, beginning of period     185,740,178       185,740,178  
Treasury Stock, beginning of period     18,927,966       18,927,966  
Common Stock, end of period 186,071,345           186,071,345  
Treasury Stock, end of period 18,566,568           18,566,568  
Class B Convertible Common Stock [Member]                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, beginning of period     28,322,419       28,322,419  
Treasury Stock, beginning of period     5,005,800       5,005,800  
Common Stock, end of period 28,319,606           28,319,606  
Treasury Stock, end of period 5,005,800           5,005,800  
Common Stock [Member] | Class A Common Stock [Member]                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Common Stock, beginning of period 185,880,112 185,873,845 185,740,178 259,080,165 258,940,446 258,718,356 185,740,178 258,718,356
Conversion of shares 191,233 6,267 133,667 5,314 2,500 5,144    
Exercise of stock options 0 0 0 428,925 137,219 216,946    
Common Stock, end of period 186,071,345 185,880,112 185,873,845 185,514,404 259,080,165 258,940,446 186,071,345 185,514,404
Share repurchases   0     0 0    
Employee stock purchases   0     0      
Grant of restricted stock awards       0 0      
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 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    
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 28,321,821 28,322,364 28,322,419 28,327,743 28,330,243 28,335,387 28,322,419 28,335,387
Conversion of shares (2,215) (543) (55) (5,314) (2,500) (5,144)    
Exercise of stock options 0 0 0 0 0 0    
Common Stock, end of period 28,319,606 28,321,821 28,322,364 28,322,429 28,327,743 28,330,243 28,319,606 28,322,429
Share repurchases   0     0 0    
Employee stock purchases   0     0      
Grant of restricted stock awards       0 0      
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 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    
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 1,012,395 1,018,119 1,149,624 9,413 7,088 1,970 1,149,624 1,970
Conversion of shares (189,018) (5,724) (133,612) 0 0 0    
Exercise of stock options 0 0 2,107 2,570 2,325 5,118    
Common Stock, end of period 823,377 1,012,395 1,018,119 11,983 9,413 7,088 823,377 11,983
Share repurchases   0     0 0    
Employee stock purchases   0     0      
Grant of restricted stock awards       0 0      
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 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    
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 18,604,964 18,636,987 18,927,966 92,971,811 91,111,003 90,743,239 18,927,966 90,743,239
Conversion of shares 0 0 0 0 0 0    
Exercise of stock options (38,154) (258,628) (173,725) 0 0 0    
Treasury Stock, end of period 18,566,568 18,604,964 18,636,987 18,970,734 92,971,811 91,111,003 18,566,568 18,970,734
Share repurchases   265,593     1,901,637 450,508    
Employee stock purchases   (36,840)     (34,203)      
Grant of restricted stock awards       (362) (3,552)      
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 (242) (2,148) (88,683) (715) (3,074) (20,392)    
Shares withheld to satisfy tax withholding requirements 94 1,176 48,562 402 2,211 12,743 49,832 15,356
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 0 0 17,439 0 0 44,016 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 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800
Conversion of shares 0 0 0 0 0 0    
Exercise of stock options 0 0 0 0 0 0    
Treasury Stock, end of period 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800 5,005,800
Share repurchases   0     0 0    
Employee stock purchases   0     0      
Grant of restricted stock awards       0 0      
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 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    
Treasury Stock [Member] | Class B Convertible Common Stock [Member] | Restricted shares [Member]                
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Cancellation of restricted shares     0