Liabilities and Restructuring Charges - Components of Other Long Term Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2020	Oct. 31, 2019
Liabilities, Other than Long-term Debt, Noncurrent [Abstract]
Deferred compensation liability	$ 269,484	$ 249,822
Other long-term liabilities	19,927	73,903
Total	$ 289,411	$ 323,725	[1]

[1] Derived from audited financial statements.