Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
May 02, 2015	May 03, 2014	May 02, 2015	May 03, 2014
Segment Reporting Information
Net revenues	$ 546,575us-gaap_SalesRevenueNet	$ 536,910us-gaap_SalesRevenueNet	$ 1,122,814us-gaap_SalesRevenueNet	$ 1,101,445us-gaap_SalesRevenueNet
Cost of revenues	174,366us-gaap_CostOfRevenue	182,618us-gaap_CostOfRevenue	360,922us-gaap_CostOfRevenue	374,483us-gaap_CostOfRevenue
Gross margin	372,209us-gaap_GrossProfit	354,292us-gaap_GrossProfit	761,892us-gaap_GrossProfit	726,962us-gaap_GrossProfit
SAN Products
Segment Reporting Information
Net revenues	313,512	321,164	666,911	676,620
Cost of revenues	73,768	84,514	159,493	177,455
Gross margin	239,744	236,650	507,418	499,165
Internet Protocol (“IP”) Networking Products
Segment Reporting Information
Net revenues	144,731	121,116	277,570	240,865
Cost of revenues	63,844	57,757	128,045	118,443
Gross margin	80,887	63,359	149,525	122,422
Global Services
Segment Reporting Information
Net revenues	88,332	94,630	178,333	183,960
Cost of revenues	36,754	40,347	73,384	78,585
Gross margin	$ 51,578	$ 54,283	$ 104,949	$ 105,375

The aggregate cost of goods produced and sold and services rendered during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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- Details

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