Basis Of Presentation (Pro Forma Cost Of Revenues And Sales And Marketing Expenses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 29, 2011		Oct. 30, 2010		Oct. 31, 2009
Revenue from External Customer [Line Items]
Cost of Revenues - Product	$ 677,196	[1]	$ 683,486	[1]	$ 739,354	[1]
Cost of Revenues - Service	186,712	[1]	176,547	[1]	180,072	[1]
Total cost of revenues	863,908	[2]	860,033	[2]	919,426	[2]
Sales and marketing expenses	608,513	[1]	534,458	[1]	385,155	[1]
Pro Forma Amount [Member]
Revenue from External Customer [Line Items]
Total cost of revenues					798,880
Sales and marketing expenses					505,701
Pro Forma Amount [Member] | Data Storage Products [Member]
Revenue from External Customer [Line Items]
Cost of Revenues - Product					408,026
Pro Forma Amount [Member] | Ethernet Products [Member]
Revenue from External Customer [Line Items]
Cost of Revenues - Product					228,908
Pro Forma Amount [Member] | Global Services [Member]
Revenue from External Customer [Line Items]
Cost of Revenues - Service					$ 161,946

[1] Fiscal year 2009 has not been updated for the new cost classification implemented in 2010 and includes system engineer costs within cost of revenues, as opposed to sales and marketing expenses starting in fiscal year 2010. See Note 1, "Basis of Presentation," of the Notes to Consolidated Financial Statements.

[2] Fiscal years 2011 and 2010 reflect the classification of system engineer costs within sales and marketing expenses as opposed to cost of revenues in prior periods. Fiscal year 2009 has not been updated for the new cost classification implemented in 2010. See Note 1, "Basis of Presentation," of the Notes to Consolidated Financial Statements.