Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands	3 Months Ended			9 Months Ended
	Jul. 30, 2011	Jul. 31, 2010		Jul. 30, 2011	Jul. 31, 2010
Net revenues	$ 502,850	$ 504,252	[1]	$ 1,596,969	$ 1,542,523	[1]
Cost of revenues	196,323	218,831	[1]	640,951	634,678	[1]
Gross margin	306,527	285,421	[1]	956,018	907,845	[1]
Data Storage Products [Member]
Net revenues	275,391	293,380	[1]	935,129	926,576	[1]
Cost of revenues	69,219	95,613	[1]	267,522	297,908	[1]
Gross margin	206,172	197,767	[1]	667,607	628,668	[1]
Ethernet Products [Member]
Net revenues	138,907	122,061	[1]	393,692	345,631	[1]
Cost of revenues	80,102	79,779	[1]	230,490	204,303	[1]
Gross margin	58,805	42,282	[1]	163,202	141,328	[1]
Global Services [Member]
Net revenues	88,552	88,811	[1]	268,148	270,316	[1]
Cost of revenues	47,002	43,439	[1]	142,939	132,467	[1]
Gross margin	$ 41,550	$ 45,372	[1]	$ 125,209	$ 137,849	[1]

[1] The three and nine months ended July 31, 2010 reflects the reclassification of SE costs from cost of revenue to sales and marketing expenses. See Note 1, "Basis of Presentation," of the Notes to Condensed Consolidated Financial Statements.