Basis of Presentation and Significant Accounting Policies - Management Reimbursement Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 1,496.0	$ 1,594.7	$ 3,109.0	$ 3,202.6
Management Reimbursement Revenue
Segment Reporting Information [Line Items]
Parking facility management fee revenue	82.4	92.8	182.0	188.0
Management Reimbursement Revenue \| Business & Industry
Segment Reporting Information [Line Items]
Parking facility management fee revenue	61.7	69.3	135.4	140.3
Management Reimbursement Revenue \| Aviation
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 20.7	$ 23.5	$ 46.6	$ 47.6

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration