Basis of Presentation and Significant Accounting Policies - Management Reimbursement Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Segment Reporting Information
Parking facility management fee revenue	$ 79.1	$ 82.5	$ 158.0	$ 162.6
Business & Industry \| Operating Segments
Segment Reporting Information
Parking facility management fee revenue	58.1	57.2	115.9	113.7
Aviation \| Operating Segments
Segment Reporting Information
Parking facility management fee revenue	16.2	21.1	32.7	40.8
Emerging Industries Group \| Operating Segments
Segment Reporting Information
Parking facility management fee revenue	$ 4.8	$ 4.2	$ 9.3	$ 8.1

Repayment received or receivable for expenses incurred on behalf of a client or customer, other than those reimbursements received by landlords from tenants.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 45
-Section 45
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=68075638&loc=d3e60722-111653

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration