Employee Benefit Plans - Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Net obligations	$ 7.4	$ 7.5
Projected benefit obligations	15.0	15.7
Fair value of assets	7.6	8.2
Expected return on assets	0.4	0.4	$ 0.5
Net periodic benefit cost	0.2	$ 0.2	$ 0.2
Expected future benefit payments	$ 13.8
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	48.00%
Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	47.00%
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocations	5.00%