Income Taxes - Provision for Income Taxes and Effective Tax Rates (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Income Tax Disclosure [Abstract]
Income before income taxes	$ 213,337	$ 236,854	$ 606,436	$ 446,593
Provision (benefit) for income taxes	$ 14,945	$ (16,057)	$ 51,214	$ (20,299)
Effective tax rate	7.00%	(6.80%)	8.40%	(4.50%)