Summary of Significant Accounting Policies - Schedule of Topic 606 Impact Balance Sheet (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Balance Sheet Related Disclosures [Abstract]
Accounts receivable, net	$ 553,895	$ 554,217
Prepaid and other current assets	290,052	67,533
Deferred income taxes	390,129	404,166
Other long-term assets	380,526	246,736
Accounts payable and accrued liabilities	506,459	578,326
Deferred revenue	1,212,476	1,152,862
Long-term deferred revenue	90,102	116,859
Other long-term liabilities	323,725	265,560
Retained earnings	3,164,144	2,543,688
Adjusted balance under ASC 605
Balance Sheet Related Disclosures [Abstract]
Accounts receivable, net	622,904
Prepaid and other current assets	79,495
Deferred income taxes	473,320
Other long-term assets	294,083
Accounts payable and accrued liabilities	497,955
Deferred revenue	1,384,117
Long-term deferred revenue	144,583
Other long-term liabilities	307,054
Retained earnings	2,818,397
Accounting Standards Update 2014-09 | Adjustments
Balance Sheet Related Disclosures [Abstract]
Accounts receivable, net	69,009
Prepaid and other current assets	(210,557)
Deferred income taxes	83,191
Other long-term assets	(86,443)
Accounts payable and accrued liabilities	(8,504)
Deferred revenue	171,641
Long-term deferred revenue	54,481
Other long-term liabilities	(16,671)
Retained earnings	$ (345,747)	$ 265,100