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CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - $ / shares
Jan. 31, 2019
Oct. 31, 2018
Stockholders' equity:    
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) 318,000,000 318,000,000