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Liabilities and Restructuring Charges - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Jul. 31, 2019
Oct. 31, 2018
Payables and Accruals [Abstract]    
Payroll and related benefits $ 391,593 $ 413,307
Other accrued liabilities 65,190 79,973
Accounts payable 14,846 85,046
Total $ 471,629 $ 578,326