Employee Benefit Plans - Summary of Impact of Deferred Plan (Detail) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Increase (reduction) to cost of revenue and operating expense	$ 27,759	$ 4,636	$ 29,606
Other income (expense), net	27,759	4,636	29,606
Net increase (decrease) to net income	$ 0	$ 0	$ 0