Consolidated Balance Sheets (Parenthetical) - $ / shares	12 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Common stock, par value	$ 1.00	$ 1.00
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	48,369,000	48,185,000
Treasury stock shares	19,077,000	18,973,000