Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Oct. 31, 2011 days years months	Oct. 31, 2010	Oct. 31, 2009
Summary Of Significant Accounting Policies [Line Items]
Depreciation expenses	$ 51.0	$ 50.3	$ 48.3
Repair and maintenance cost	20.9	19.0	19.2
Capitalized software development cost	3.0	2.9	3.0
Amortization of capitalized software development cost	3.0	3.0	2.9
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
Hardware product warranty period (in months)	6
Term Licenses [Member]
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual Licenses [Member]
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Perpetual And Term Licenses [Member]
Summary Of Significant Accounting Policies [Line Items]
License fee percentage	75.00%
Maintenance fee percentage	100.00%
Capitalized Software Development Costs [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortization period (in years)	2
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortization period (in years)	1
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Intangible assets amortization period (in years)	10