Parenthetical Data to the Consolidated Condensed Balance Sheets (USD $)	Feb. 29, 2012	Aug. 31, 2011	Feb. 28, 2011
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.0625	$ 0.0625	$ 0.0625
Preferred stock, authorized (in shares)	32,000,000	32,000,000	32,000,000
Preferred stock, issued (in shares)	0	0	0
Common stock, par value (in dollars per share)	$ 0.078125	$ 0.078125	$ 0.078125
Common stock, authorized shares (in shares)	3,200,000,000	3,200,000,000	3,200,000,000
Common stock, issued (in shares)	1,025,400,000	1,025,400,000	1,025,400,000
Treasury stock, shares (in shares)	162,649,466	136,105,870	109,940,598