Consolidated Balance Sheets (Parenthetical)	Oct. 31, 2016 $ / shares shares
Statement of Financial Position [Abstract]
Preferred stock, par value ($ per share) | $ / shares	$ 0.01
Preferred stock, authorized (shares)	300,000,000
Preferred stock, issued (shares)	0
Common stock, par value ($ per share) | $ / shares	$ 0.01
Common stock, authorized (shares)	9,600,000,000
Common stock, issued (shares)	1,666,000,000
Common stock, outstanding (shares)	1,666,000,000