Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parenthetical)

v3.8.0.1
Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Nov. 30, 2017
Feb. 28, 2017
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 258,532,772 257,506,184
Treasury stock, shares at cost 87,158,141 86,262,971
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 28,335,387 28,358,527
Treasury stock, shares at cost 5,005,800 5,005,800