CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares shares in Millions	Oct. 31, 2016	Oct. 31, 2015
Stockholders' equity:
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	125	125
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Shares Outstanding (in shares)	0	0
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	2,000	2,000
Common stock issued (in shares)	614	611
Treasury stock, at cost (in shares)	290	279