Income Taxes - Components of Income From Continuing Operations Before Income Taxes and Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Income Tax Disclosure [Abstract]
United States	$ 94.8	$ 76.1	$ 45.1
Foreign	(7.1)	10.8	6.8
Income from continuing operations before income taxes	87.7	86.9	51.9
Current:
Federal	(4.3)	(5.9)	17.5
State	(7.3)	(6.0)	(9.3)
Foreign	(3.9)	(3.0)	(1.5)
Deferred:
Federal	21.8	5.0	3.6
State	0.2	0.3	(0.5)
Foreign	1.7	0.8	0.6
Income tax benefit (provision)	$ 8.2	$ (8.8)	$ 10.4