Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended			36 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (shares)	0	0	0
Stock options exercised (shares)	0	0	0
Share based compensation expense	$ (1.2)	$ 12.7	$ 6.5
Number of shares forfeited	0	0	0
Long-term incentive plan, requisite service period	3 years
Long Term Incentive Plan Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ (2.4)	$ 11.6	$ 5.3
Shares of restricted stock (shares)	153,275	291,520
Weighted average grant date fair value (usd per share)	$ 34.50	$ 39.83
2005 Outside Directors Equity Award Plan Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 1.1	$ 1.1	$ 1.2
Shares of restricted stock (shares)	27,768	25,144
Weighted average grant date fair value (usd per share)	$ 38.89	$ 42.95
Class A Common Stock 2001 Plan \| Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense	$ 0.1	$ 0.1
Grants in the period (shares)		9,000
Performance Shares \| Scenario, Forecast \| 2020 Long Term Incentive Plan Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of restricted stock (shares)				258,519
Weighted average grant date fair value (usd per share)				$ 35.58
Award vesting period				3 years
Restricted Stock Units (RSUs) \| Scenario, Forecast \| 2020 Long Term Incentive Plan Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term incentive plan, requisite service period				3 years
Shares of restricted stock (shares)				147,325
Weighted average grant date fair value (usd per share)				$ 37.42
Share-based Payment Arrangement, Tranche One \| Class A Common Stock 2001 Plan \| Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting installments (shares)	3,000	3,000	3,000