Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	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