Financial Assets and Liabilities - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Oct. 31, 2018	Jan. 31, 2018	Oct. 31, 2017
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 592,305	$ 723,115
Total cash, cash equivalents and restricted cash	594,206	725,001	$ 607,922	$ 1,050,075
Restricted cash included in Prepaid expenses and other current assets
Cash and Cash Equivalents [Line Items]
Restricted cash	1,169	1,164
Restricted cash included in Other long-term assets
Cash and Cash Equivalents [Line Items]
Restricted cash	$ 732	$ 722