Basis of Presentation and Significant Accounting Policies - Management Reimbursement Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 93.5	$ 85.8	$ 282.9	$ 243.8
Business & Industry
Segment Reporting Information [Line Items]
Parking facility management fee revenue	65.0	59.3	191.4	175.2
Aviation
Segment Reporting Information [Line Items]
Parking facility management fee revenue	23.8	21.9	76.9	54.7
Healthcare
Segment Reporting Information [Line Items]
Parking facility management fee revenue	$ 4.7	$ 4.6	$ 14.6	$ 14.0