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Summary of Significant Accounting Policies - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Oct. 31, 2018
Oct. 31, 2017
Accounts payable and accrued liabilities Current    
Payroll and related benefits $ 413,307 $ 382,773
Other accrued liabilities 79,973 97,119
Accounts payable 85,046 19,954
Total $ 578,326 $ 499,846