Basis of Presentation and Significant Accounting Policies - Management Reimbursement Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 85.8	$ 81.3	$ 243.8	$ 243.8
Business & Industry
Segment Reporting Information [Line Items]
Parking facility management fee revenue	59.3	57.4	175.3	171.1
Aviation
Segment Reporting Information [Line Items]
Parking facility management fee revenue	21.9	19.4	54.7	60.2
Emerging Industries Group
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 4.5	$ 4.5	$ 13.9	$ 12.6