Unaudited Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares |
Jul. 31, 2020 |
Oct. 31, 2019 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Preferred Stock, par value (in USD per share) | $ 0.01 | $ 0.01 |
| Preferred Stock, shares authorized (in shares) | 2,000,000 | 2,000,000 |
| Preferred Stock, shares outstanding (in shares) | 0 | 0 |
| Common Stock, par value (in USD per share) | $ 0.01 | $ 0.01 |
| Common Stock, shares authorized (in shares) | 400,000,000 | 400,000,000 |
| Common Stock, shares outstanding (in shares) | 151,758,000 | 150,331,000 |
| Treasury stock, shares (in shares) | 5,503,000 | 6,930,000 |