CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Aug. 31, 2016	Aug. 31, 2015
Treasury stock, shares	20,439,434	19,726,479
Common stock, par value	$ 0.20
Common stock, shares authorized	168,000,000
Common stock, shares issued	79,393,393	78,932,533
Common Class A
Common stock, par value	$ 0.2
Common stock, shares authorized	168,000,000
Common stock, shares issued	79,393,393