Estimated Future Amortization of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Apr. 30, 2013
Expected Amortization Expense [Line Items]
Remainder of fiscal 2013	$ 63,398
2014	108,230
2015	90,798
2016	57,018
2017	24,949
2018 and thereafter	41,851
IPR&D	10,975	[1]
Total	$ 397,219

[1] IPR&D projects are estimated to be completed within two years as of April 30, 2013. Amortization will begin upon project completion or the asset will be written off upon abandonment.