Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Segment Reporting Information [Line Items]
Net revenues	$ 555,332	$ 502,850	$ 1,659,413	$ 1,596,969
Cost of revenues	214,854	196,323	637,084	640,951
Gross margin	340,478	306,527	1,022,329	956,018
Data Storage products
Segment Reporting Information [Line Items]
Net revenues	321,464	275,391	1,017,258	935,129
Cost of revenues	87,113	69,219	273,308	267,522
Gross margin	234,351	206,172	743,950	667,607
Ethernet products
Segment Reporting Information [Line Items]
Net revenues	145,817	138,907	382,429	393,692
Cost of revenues	86,524	80,102	239,913	230,490
Gross margin	59,293	58,805	142,516	163,202
Global Services
Segment Reporting Information [Line Items]
Net revenues	88,051	88,552	259,726	268,148
Cost of revenues	41,217	47,002	123,863	142,939
Gross margin	$ 46,834	$ 41,550	$ 135,863	$ 125,209