Income statement location and amount of gains and losses on derivative instrument fair values for designated hedge instruments, net of tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	$ (2,428)	$ (8,872)
Amount of gain (loss) reclassified from OCI (effective portion)	(14,235)	(1,989)
Foreign Exchange Contracts | Revenue
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	5,212	(5,647)
Amount of gain (loss) reclassified from OCI (effective portion)	(1,868)	(8,561)
Foreign Exchange Contracts | Operating Expenses
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in OCI on derivatives (effective portion)	(7,640)	(3,225)
Amount of gain (loss) reclassified from OCI (effective portion)	$ (12,367)	$ 6,572