Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 26, 2013	Jan. 28, 2012
Segment Reporting Information
Net revenues	$ 588,729	$ 560,642
Cost of revenues	214,804	215,873
Gross margin	373,925	344,769
SAN products
Segment Reporting Information
Net revenues	361,734	352,872
Cost of revenues	96,953	95,838
Gross margin	264,781	257,034
IP Networking products
Segment Reporting Information
Net revenues	140,513	123,430
Cost of revenues	77,422	79,569
Gross margin	63,091	43,861
Global Services
Segment Reporting Information
Net revenues	86,482	84,340
Cost of revenues	40,429	40,466
Gross margin	$ 46,053	$ 43,874