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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
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Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2015
Summary Of Significant Accounting Policies [Line Items] |  |  |
Cash and cash equivalent maturity period, months | 3 months |  |
Depreciation expenses | $ 82,800,000 | $ 73,800,000 | $ 71,100,000
Repair and maintenance costs | 40,600,000 | 38,800,000 | 32,300,000
Goodwill impairment loss | 0 | 0 | 0
Long-lived assets impairment loss | 0 | 0 | 0
Restructuring charges | $ 36,586,000 | 9,633,000 | $ 15,088,000
Additional maintenance perpetual license period (in years) | 20 years |  |
Software product warranty period (in days) | 90 days |  |
Perpetual licenses |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
License fee percentage | 75.00% |  |
Maintenance fee percentage | 100.00% |  |
Maximum |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Hardware product warranty period (in months) | 6 months |  |
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 |  |
Employee Severance and Benefits |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges | $ 36,600,000 |  |
Restructuring reserve | $ 17,500,000 |  |
Employee Severance and Benefits | 2016 Restructuring |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restructuring charges |  | 9,600,000 |
Restructuring reserve |  | 5,700,000 |
Payments for restructuring charges |  | $ 3,900,000 |

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