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Stockholders' Equity - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 07, 2019 | Feb. 08, 2019 | Aug. 07, 2018 | Feb. 09, 2018 | Oct. 31, 2019 | Oct. 31, 2018 | Oct. 31, 2017
Stockholders' Equity Note [Abstract] |  |  |  |  |  |  |
Dividends on common stock | $ 1.5 | $ 1.5 | $ 1.5 | $ 1.5 | $ 3.0 | $ 2.9 | $ 2.9
Dividends on common stock (in dollars per share) | $ 0.03 | $ 0.03 | $ 0.03 | $ 0.03 | $ 0.03 | $ 0.03 |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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