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Liabilities and Restructuring Charges - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Apr. 30, 2020
Oct. 31, 2019
Payables and Accruals [Abstract]    
Payroll and related benefits $ 307,291 $ 417,157
Other accrued liabilities 88,008 69,487
Accounts payable 51,756 19,815
Total $ 447,055 $ 506,459 [1]
[1]
Derived from audited financial statements.