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Stock-Based Compensation - Summarized Information on Currently Outstanding Options (Additional Information) (Detail)	12 Months Ended
	Oct. 31, 2020 $ / shares
$43 - $90
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, Lower range limit (in dollars per share)	$ 43
Exercise price range, Upper range limit (in dollars per share)	90
$91 - $140
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, Lower range limit (in dollars per share)	91
Exercise price range, Upper range limit (in dollars per share)	140
$141 - $190
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Exercise price range, Lower range limit (in dollars per share)	141
Exercise price range, Upper range limit (in dollars per share)	$ 190

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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