Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
May 31, 2018
Feb. 28, 2018
Class A Common Stock [Member]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 322,000,000 322,000,000
Common stock, shares issued 258,940,446 258,718,356
Treasury stock, shares at cost 91,111,003 90,743,239
Class B Convertible Common Stock [Member]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 30,000,000 30,000,000
Common stock, shares issued 28,330,243 28,335,387
Treasury stock, shares at cost 5,005,800 5,005,800