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Basis of Presentation and Significant Accounting Policies - Management Reimbursement Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2018 | Apr. 30, 2017 | Apr. 30, 2018 | Apr. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Parking facility management fee revenue | $ 96.1 | $ 79.1 | $ 189.4 | $ 158.0
Business & Industry |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Parking facility management fee revenue | 63.5 | 58.1 | 126.5 | 115.9
Aviation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Parking facility management fee revenue | 27.6 | 16.2 | 53.1 | 32.7
Healthcare |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Parking facility management fee revenue | $ 5.0 | $ 4.8 | $ 9.9 | $ 9.4

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