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Fair Value Of Option Shares Granted

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Share based compensation arrangement assumed stock plans remaining outstanding shares.

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- Definition

Share based compensation arrangement for options contractual term.

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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The addition or reduction in the number of reserved shares that could potentially be issued under the option plan attributable to reasons other than grants, exercises, forfeitures, and expirations during the reporting period.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Employee Benefit Plans (Equity Compensation Plans) - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	Apr. 08, 2019	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Apr. 06, 2017	Oct. 31, 2016
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding (in shares)		3,857,000	3,769,000	3,843,000		4,035,000
Restricted Stock Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		3 years
Restricted Stock Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)		4 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding (in shares)		11,000	20,000	38,000		43,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for future grant (in shares)		12,208,000	12,439,000	12,583,000		11,244,000
2006 Employee Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation arrangement for options contractual term (in years)		7 years
Vesting period, (in years)		4 years
Additional reserved for future issuance under the 2006 Employee Plan (in shares)	3,200,000
Shares available for future grant (in shares)		12,200,000
2006 Employee Equity Incentive Plan \| Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding (in shares)		3,800,000
2006 Employee Equity Incentive Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate stock options outstanding (in shares)		5,100,000
2005 Non Employee Directors Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate stock options outstanding (in shares)		65,060
Aggregate stock options granted under 2005 director plan (in shares)				188,709
Fair value of option shares granted				$ 6.7
2005 Non Employee Directors Plan \| Stock Option \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)			3 years
2005 Non Employee Directors Plan \| Stock Option \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, (in years)				4 years
2017 Directors Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved for future issuance (in shares)		405,092			450,000
Restricted stock awards issued (in shares)		10,521
Aggregate grant date fair value of restricted stock awards		$ 1.2
2017 Directors Plan \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate restricted stock units outstanding (in shares)		10,521
2017 Directors Plan \| Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate stock options outstanding (in shares)		0
Other Assumed Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Assumed shares remaining outstanding (in shares)		200,000