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Summary of Significant Accounting Policies - Schedule of Topic 606 Impact Balance Sheet (Details) - USD ($) $ in Thousands | Jul. 31, 2019 | Oct. 31, 2018
--- | --- | ---
Balance Sheet Related Disclosures [Abstract] |  |
Accounts receivable, net | $ 457,390 | $ 554,217
Prepaid and other current assets | 288,616 | 67,533
Deferred income taxes | 339,354 | 404,166
Other long-term assets | 383,509 | 246,736
Accounts payable and accrued liabilities | 471,629 | 578,326
Deferred revenue | 1,138,993 | 1,152,862
Long-term deferred revenue | 91,229 | 116,859
Other long-term liabilities | 338,928 | 265,560
Retained earnings | 3,003,430 | 2,543,688
Adjusted balance under ASC 605 |  |
Balance Sheet Related Disclosures [Abstract] |  |
Accounts receivable, net | 521,512 |
Prepaid and other current assets | 82,794 |
Deferred income taxes | 416,245 |
Other long-term assets | 288,883 |
Accounts payable and accrued liabilities | 461,216 |
Deferred revenue | 1,271,443 |
Long-term deferred revenue | 132,814 |
Other long-term liabilities | 322,257 |
Retained earnings | 2,697,044 |
Accounting Standards Update 2014-09 | Adjustments |  |
Balance Sheet Related Disclosures [Abstract] |  |
Accounts receivable, net | 64,122 |
Prepaid and other current assets | (205,822) |
Deferred income taxes | 76,891 |
Other long-term assets | (94,626) |
Accounts payable and accrued liabilities | (10,413) |
Deferred revenue | 132,450 |
Long-term deferred revenue | 41,585 |
Other long-term liabilities | (16,671) |
Retained earnings | $ (306,386) | $ 265,100

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