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Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
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Oct. 31, 2019 USD ($) chief_executive_officer Segment | Oct. 31, 2018 USD ($) Segment | Oct. 31, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of reportable operating segment | Segment | 2 | 1 |
Number of chief executive officers | chief_executive_officer | 2 |  |
Cash and cash equivalent maturity period, months | 3 months |  |
Depreciation expenses | $ 100,400,000 | $ 72,800,000 | $ 82,800,000
Repair and maintenance costs | 52,500,000 | 45,700,000 | 40,600,000
Goodwill impairment loss | 0 | 0 | 0
Long-lived assets impairment loss | 0 | 0 | 0
Restructuring charges | 47,186,000 | 12,945,000 | 36,586,000
Retained earnings | 3,164,144,000 | 2,543,688,000 |
Unbilled receivables | 38,175,000 | 36,699,000 |
Contract with customer, asset, net | 210,557,000 | 126,897,000 |
Contract with customer, liability | 1,302,578,000 | 1,104,110,000 |
Capitalized contract cost, net | 86,400,000 |  |
Deferred tax liabilities, net | 78,384,000 | 73,205,000 |
Contract with customer, liability, revenue recognized | 1,000,000,000 |  |
Revenue, remaining performance obligation, amount | 4,400,000,000 |  |
Revenue, remaining performance obligation, non-cancellable, amount | $ 494,300,000 |  |
Revenue, remaining performance obligation, excluding non-cancellable, recognized over twelve month period, percent | 56.00% |  |
Capitalized contract cost, amortization | $ 62,800,000 |  |
Software product warranty period (in days) | 90 days |  |
Sales Based Royalties |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Contract with customer, liability, revenue recognized | $ 80,000,000.0 |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Hardware product warranty period (in months) | 6 months |  |
2019 Restructuring | Minimum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | $ 56,000,000 |  |
2019 Restructuring | Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | 65,000,000 |  |
Employee Severance and Benefits | 2019 Restructuring |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | 47,200,000 |  |
Payments for restructuring charges | 24,600,000 |  |
Restructuring reserve | $ 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 |
Employee Severance and Benefits | 2017 Restructuring |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges |  |  | 36,600,000
Restructuring reserve |  |  | $ 17,500,000
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 2014-09 | Adjustments |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | $ 0 |  |
Retained earnings | $ (345,747,000) | 265,100,000 |
Unbilled receivables |  | (27,400,000) |
Contract with customer, asset, net |  | 126,900,000 |
Contract with customer, liability |  | (165,600,000) |
Capitalized contract cost, net |  | 73,800,000 |
Deferred tax liabilities, net |  | $ 81,400,000 |

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