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Stock-Based Compensation - Summarized Information on Currently Outstanding Options (Detail) shares in Thousands	12 Months Ended
	Oct. 31, 2020 $ / shares 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
Stock Options | $43 - $90
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number outstanding (in shares) | shares	279
Weighted-average remaining contractual life, in years	4 years
Weighted-average exercise price (in dollars per share)	$ 70.40
Number exercisable (in shares) | shares	279
Weighted-average exercise price (in dollars per share)	$ 70.40
Stock Options | $91 - $140
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number outstanding (in shares) | shares	844
Weighted-average remaining contractual life, in years	7 years 1 month 6 days
Weighted-average exercise price (in dollars per share)	$ 120.56
Number exercisable (in shares) | shares	352
Weighted-average exercise price (in dollars per share)	$ 117.43
Stock Options | $141 - $190
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number outstanding (in shares) | shares	364
Weighted-average remaining contractual life, in years	9 years 1 month 6 days
Weighted-average exercise price (in dollars per share)	$ 166.66
Number exercisable (in shares) | shares	1
Weighted-average exercise price (in dollars per share)	$ 165.21

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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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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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.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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