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Commitments and Contingencies - Additional Information (Detail) ft² in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 29, 2018 USD ($) | Jul. 31, 2018 USD ($) | Oct. 31, 2019 USD ($) ft² Building | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Rent expenses |  |  | $ 91,300,000 | $ 75,700,000 | $ 68,100,000
Number of buildings to be leased | Building |  |  | 2 |  |
Total square feet of buildings | ft² |  |  | 341 |  |
Lease renewal term, in years |  |  | 10 years |  |
Additional renewal term, in years |  |  | 9 years |  |
Payments for legal settlements | $ 65,000,000.0 |  |  |  |
Release of loss contingency accrual |  | $ 39,000,000.0 |  |  |
Litigation settlement, expense |  | $ 26,000,000.0 |  |  |
Patent cross-license |  |  | 7 years |  |
Minimum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Potential one-time termination charge |  |  | $ 0.0 |  |
Maximum |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Potential one-time termination charge |  |  | $ 25,000,000.0 |  |

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