Stock Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2013	Apr. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	$ 15,529	$ 20,604	$ 33,229	$ 36,853
Income tax benefit	(3,865)	(4,689)	(8,271)	(8,388)
Stock compensation expense after taxes	11,664	15,915	24,958	28,465
Cost Of License
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	1,481	1,626	3,305	3,382
Cost Of Maintenance And Service
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	361	390	844	835
Research And Development Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	7,376	8,691	15,542	16,244
Sales And Marketing Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	3,200	3,310	6,885	6,601
General And Administrative Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock compensation expense before taxes	$ 3,111	$ 6,587	$ 6,653	$ 9,791