CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) (Parenthetical) - $ / shares |
Apr. 30, 2016 |
Oct. 31, 2015 |
|---|---|---|
| Stockholders' equity: | ||
| Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized (in shares) | 125,000,000 | 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) | 612,000,000 | 611,000,000 |
| Treasury stock at cost, shares (in shares) | 287,000,000 | 279,000,000 |