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Segment Disclosure - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jan. 31, 2019 | Jan. 31, 2018
Segment Reporting Information [Line Items] |  |
Total revenue | $ 820,401 | $ 769,426
Adjusted operating income | 147,414 | 107,718
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Total revenue | 820,401 | 769,426
Adjusted operating income | $ 200,952 | $ 195,946
Adjusted operating margin | 24.00% | 25.00%
Operating Segments | Semiconductor & System Design: |  |
Segment Reporting Information [Line Items] |  |
Total revenue | $ 737,906 | $ 705,333
Adjusted operating income | $ 195,317 | $ 199,116
Adjusted operating margin | 26.00% | 28.00%
Operating Segments | Adjusted operating margin |  |
Segment Reporting Information [Line Items] |  |
Total revenue | $ 82,495 | $ 64,093
Adjusted operating income | $ 5,635 | $ (3,170)
Adjusted operating margin | 7.00% | (5.00%)

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