Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Oct. 31, 2012 Y	Oct. 31, 2011	Oct. 31, 2010
Summary Of Significant Accounting Policies [Line Items]
Depreciation expenses	$ 52,800,000	$ 51,000,000	$ 50,300,000
Repair and maintenance costs	23,700,000	20,900,000	19,000,000
Goodwill impairment loss	0	0	0
Long-lived assets impairment loss	$ 0	$ 0	$ 0
Additional maintenance perpetual license period (in years)	20
Software product warranty period (in days)	90 days
Term Licenses
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual Licenses
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual And Term 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