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Summary of Significant Accounting Policies - Schedule of Topic 606 Impact Income Statement (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | $ 852,970 | $ 779,714 | $ 2,509,613 | $ 2,325,976
Amortization of intangible assets | 13,603 | 20,154 | 45,927 | 59,612
Total cost of revenue | 186,632 | 185,381 | 570,203 | 545,316
Gross margin | 666,338 | 594,333 | 1,939,410 | 1,780,660
Research and development | 284,804 | 277,402 | 846,429 | 793,947
Sales and marketing | 157,109 | 157,953 | 471,720 | 455,653
General and administrative | 67,382 | 84,336 | 165,794 | 199,517
Amortization of intangible assets | 10,111 | 10,651 | 31,211 | 30,926
Restructuring | 19,338 | 23 | 33,746 | 1,917
Total operating expenses | 538,744 | 530,365 | 1,548,900 | 1,481,960
Operating income | 127,594 | 63,968 | 390,510 | 298,700
Other income (expense), net | 5,317 | 7,925 | 23,373 | 12,595
Income before income taxes | 132,911 | 71,893 | 413,883 | 311,295
Provision (benefit) for income taxes | 32,982 | (7,516) | 42,230 | 133,105
Net income | $ 99,929 | $ 79,409 | $ 371,653 | $ 178,190
Basic (in USD per share) | $ 0.67 | $ 0.53 | $ 2.48 | $ 1.20
Diluted (in USD per share) | $ 0.65 | $ 0.52 | $ 2.42 | $ 1.16
Basic (shares) | 150,123 | 148,490 | 149,708 | 148,760
Diluted (shares) | 154,600 | 152,614 | 153,859 | 153,118
Time-based products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | $ 537,569 | $ 570,053 | $ 1,649,590 | $ 1,697,756
Cost of revenue | 113,533 | 115,437 | 346,163 | 335,030
Upfront products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | 177,552 | 99,579 | 451,466 | 291,143
Maintenance and service |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | 137,849 | 110,082 | 408,557 | 337,077
Cost of revenue | 59,496 | $ 49,790 | 178,113 | $ 150,674
Adjustments | Accounting Standards Update 2014-09 |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | (44,577) |  | (50,595) |
Amortization of intangible assets | 0 |  | 0 |
Total cost of revenue | 0 |  | 0 |
Gross margin | (44,577) |  | (50,595) |
Research and development | 0 |  | 0 |
Sales and marketing | (2,731) |  | 10,395 |
General and administrative | 0 |  | 0 |
Amortization of intangible assets | 0 |  | 0 |
Restructuring | 0 |  | 0 |
Total operating expenses | (2,731) |  | 10,395 |
Operating income | (41,846) |  | (60,990) |
Other income (expense), net | 0 |  | 0 |
Income before income taxes | (41,846) |  | (60,990) |
Provision (benefit) for income taxes | (9,127) |  | (12,198) |
Net income | $ (32,719) |  | $ (48,792) |
Basic (in USD per share) | $ (0.22) |  | $ (0.32) |
Diluted (in USD per share) | $ (0.22) |  | $ (0.32) |
Adjustments | Accounting Standards Update 2014-09 | Time-based products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | $ 55,604 |  | $ 158,222 |
Cost of revenue | 0 |  | 0 |
Adjustments | Accounting Standards Update 2014-09 | Upfront products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | (73,267) |  | (151,110) |
Adjustments | Accounting Standards Update 2014-09 | Maintenance and service |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | (26,914) |  | (57,707) |
Cost of revenue | 0 |  | 0 |
Adjusted balance under ASC 605 |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | 808,393 |  | 2,459,018 |
Amortization of intangible assets | 13,603 |  | 45,927 |
Total cost of revenue | 186,632 |  | 570,203 |
Gross margin | 621,761 |  | 1,888,815 |
Research and development | 284,804 |  | 846,429 |
Sales and marketing | 154,378 |  | 482,115 |
General and administrative | 67,382 |  | 165,794 |
Amortization of intangible assets | 10,111 |  | 31,211 |
Restructuring | 19,338 |  | 33,746 |
Total operating expenses | 536,013 |  | 1,559,295 |
Operating income | 85,748 |  | 329,520 |
Other income (expense), net | 5,317 |  | 23,373 |
Income before income taxes | 91,065 |  | 352,893 |
Provision (benefit) for income taxes | 23,855 |  | 30,032 |
Net income | $ 67,210 |  | $ 322,861 |
Basic (in USD per share) | $ 0.45 |  | $ 2.16 |
Diluted (in USD per share) | $ 0.43 |  | $ 2.10 |
Basic (shares) | 150,123 |  | 149,708 |
Diluted (shares) | 154,600 |  | 153,859 |
Adjusted balance under ASC 605 | Time-based products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | $ 593,173 |  | $ 1,807,812 |
Cost of revenue | 113,533 |  | 346,163 |
Adjusted balance under ASC 605 | Upfront products |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | 104,285 |  | 300,356 |
Adjusted balance under ASC 605 | Maintenance and service |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Total revenue | 110,935 |  | 350,850 |
Cost of revenue | $ 59,496 |  | $ 178,113 |

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