Income Taxes - Components of Income Before Income Taxes and Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Income Tax Disclosure [Abstract]
United States	$ 60.5	$ 104.5	$ 94.9
Foreign	11.9	6.1	3.8
Total income before income taxes	72.4	110.6	98.7
Current:
Federal	3.7	32.6	13.3
State	3.7	7.6	9.5
Foreign	2.8	1.3	0.8
Deferred:
Federal	7.9	0.8	10.0
State	0.3	1.4	2.5
Foreign	(0.1)	0.0	0.0
Provision for income taxes	$ 18.3	$ 43.7	$ 36.1