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Liabilities and Restructuring Charges - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Apr. 30, 2019
Oct. 31, 2018
Payables and Accruals [Abstract]    
Payroll and related benefits $ 272,998 $ 413,307
Other accrued liabilities 61,631 79,973
Accounts payable 31,219 85,046
Total $ 365,848 $ 578,326