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Segment Disclosure - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jul. 31, 2018 | Jul. 31, 2019 | Jul. 31, 2018
Segment Reporting Information [Line Items] |  |  |  |
Total revenue | $ 852,970 | $ 779,714 | $ 2,509,613 | $ 2,325,976
Adjusted operating income | 127,594 | 63,968 | 390,510 | 298,700
Operating Segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Adjusted operating income | $ 216,581 | $ 167,847 | $ 627,369 | $ 553,909
Adjusted operating margin | 25.00% | 22.00% | 25.00% | 24.00%
Operating Segments | Semiconductor & System Design: |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenue | $ 769,411 | $ 708,413 | $ 2,260,372 | $ 2,122,780
Adjusted operating income | $ 207,773 | $ 169,798 | $ 604,497 | $ 564,656
Adjusted operating margin | 27.00% | 24.00% | 27.00% | 27.00%
Operating Segments | Adjusted operating margin |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenue | $ 83,559 | $ 71,301 | $ 249,241 | $ 203,196
Adjusted operating income | $ 8,808 | $ (1,951) | $ 22,872 | $ (10,747)
Adjusted operating margin | 11.00% | (3.00%) | 9.00% | (5.00%)

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