Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory rate	21.00%	23.33%	35.00%
Impact of foreign tax rate differential	0.10%	(0.57%)	(9.86%)
State and local taxes, net of federal tax benefit	1.99%	2.38%	1.35%
Net impact of changes in valuation allowances	2.41%	5.65%	20.74%
Non-deductible write-off and impairment of goodwill and other intangible assets	0.29%	0.06%	(0.02%)
Unrecognized tax benefits	(0.76%)	3.41%	(2.00%)
Permanent book-tax differences	(0.87%)	(4.03%)	(15.71%)
Withholding taxes	2.43%	1.84%	1.88%
Tax Reform Act	(0.19%)	(7.31%)	0.00%
Other items, net	0.58%	(0.33%)	2.20%
Effective income tax rate	26.98%	24.43%	33.58%

Effective Income Tax Rate Reconciliation, Permanent book-tax differences, Percent

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Effective Income Tax Rate Reconciliation, Tax Reform Act. Percent

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Effective income tax rate reconciliation unrecognized tax benefits.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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