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Summary of Significant Accounting Policies and Related Data - Other Long-Lived Assets (Details) - USD ($) | 12 Months Ended
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Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Indefinite-lived Intangible Assets [Line Items] |  |  |
Estimated useful life (years) | 15 years 6 months | 15 years 6 months |
Impairment of long-lived assets held-for-use | $ 0 | $ 0 | $ 0
Minimum |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Estimated useful life (years) | 1 year |  |
Maximum |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Estimated useful life (years) | 20 years |  |

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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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