Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021	Oct. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (0.4)	$ 7.2	$ (2.2)	$ 7.2
Pre-tax (income) loss	(14.80%)	25.80%	(42.30%)	25.90%
Net discrete tax expense (benefit) related to net operating loss carrybacks	$ 0.3
Net discrete tax expense (benefit) related to share-based compensation		$ (0.1)	$ (0.9)	$ (1.2)
Unrecognized tax benefits	$ 4.1		$ 4.1		$ 4.0