Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 25, 2014	Jan. 26, 2013
Segment Reporting Information
Net revenues	$ 564,535	$ 588,729
Cost of revenues	191,865	214,804
Gross margin	372,670	373,925
SAN Products
Segment Reporting Information
Net revenues	355,456	361,734
Cost of revenues	92,941	96,953
Gross margin	262,515	264,781
IP Networking Products
Segment Reporting Information
Net revenues	119,749	140,513
Cost of revenues	60,686	77,422
Gross margin	59,063	63,091
Global Services
Segment Reporting Information
Net revenues	89,330	86,482
Cost of revenues	38,238	40,429
Gross margin	$ 51,092	$ 46,053