Employee Benefit Plans - Defined Contribution Plans (Details) $ in Millions	12 Months Ended
Oct. 31, 2018 USD ($) defined_contribution_plan	Oct. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)
Retirement Benefits [Abstract]
Number of defined contribution plans \| defined_contribution_plan	4
Cost recognized \| $	$ 21.6	$ 13.7	$ 11.7

Amount of cost for defined contribution plan.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration