CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) (USD $)
Jan. 31, 2015
Oct. 31, 2014
Stockholders' Equity Attributable to Parent [Abstract]    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 125,000,000 125,000,000
Preferred stock, issued and outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 2,000,000,000 2,000,000,000
Common stock, issued and outstanding (in shares) 609,000,000 608,000,000
Treasury stock at cost, shares (in shares) 273,000,000 273,000,000