Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Jul. 31, 2012	Oct. 31, 2011
Consolidated Condensed Balance Sheets
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	300	300
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	9,600	9,600
Common stock, shares issued	1,967	1,991
Common stock, shares outstanding	1,967	1,991