Schedule II - Valuation and Qualifying Accounts for Deferred Income Tax Valuation Allowance Footnote (Details) $ in Millions	12 Months Ended
Oct. 31, 2018 USD ($)
SEC Schedule, 12-09, Valuation Allowance, Tax Credit Carryforward
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance from prior years	$ 16.5

Amount of decrease in valuation and qualifying accounts and reserves.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09(Column D))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690

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Balance Type:	debit
Period Type:	duration