Liabilities and Restructuring Charges - Components of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jul. 31, 2016	Oct. 31, 2015
Payables and Accruals [Abstract]
Payroll and related benefits	$ 254,604	$ 315,078
Other accrued liabilities	66,786	60,545
Accounts payable	26,216	9,919
Total	$ 347,606	$ 385,542	[1]

[1] Derived from audited financial statements.