Employee Benefit Plans - Deferred Compensation Plans (Details) - USD ($) $ in Millions		12 Months Ended
		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Deferred Compensation Plans
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Total liability of deferred compensation		$ 17.6	$ 19.1
Compensation expense		0.4	0.4	$ 0.5
Rabbi Trust
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Fair value deferred compensation plan assets	[1]	$ 4.6	$ 4.9

[1] Cash and cash equivalents are stated at nominal value, which equals fair value.