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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018 | Nov. 01, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Cash and cash equivalent maturity period, months | 3 months |  |  |
Operating lease, right-of-use asset | $ 465,818,000 | $ 0 |  |
Operating Lease, Liability | 535,584,000 |  |  |
Depreciation expenses | 119,100,000 | 100,400,000 | $ 72,800,000 |
Repair and maintenance costs | 62,100,000 | 52,500,000 | 45,700,000 |
Goodwill impairment loss | 0 | 0 | 0 |
Long-lived assets impairment loss | 0 | 0 |  |
Restructuring charges | $ 36,059,000 | 47,186,000 | 12,945,000 |
Software product warranty period (in days) | 90 days |  |  |
Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Hardware product warranty period (in months) | 6 months |  |  |
2019 Restructuring |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Restructuring charges |  | 83,300,000 |  |
Employee Severance and Benefits | 2019 Restructuring |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Restructuring charges | $ 36,100,000 | 47,200,000 |  |
Payments for restructuring charges | 57,400,000 | 24,600,000 |  |
Restructuring reserve | $ 1,300,000 | $ 22,600,000 |  |
Employee Severance and Benefits | 2018 Restructuring |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Restructuring charges |  |  | 12,900,000 |
Restructuring reserve |  |  | $ 8,100,000 |
Intangible Assets | Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Intangible assets amortization period | 1 year |  |  |
Intangible Assets | Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Intangible assets amortization period | 10 years |  |  |
Accounting Standards Update 2016-02 |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Operating lease, right-of-use asset |  |  |  | $ 475,000,000
Operating Lease, Liability |  |  |  | $ 540,000,000

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