Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalent maturity period, months	3 months
Depreciation expenses	$ 72,800,000	$ 82,800,000	$ 73,800,000
Repair and maintenance costs	45,700,000	40,600,000	38,800,000
Goodwill impairment loss	0	0	0
Long-lived assets impairment loss		0	0
Restructuring charges	$ 12,945,000	36,586,000	9,633,000
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 | 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
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