Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	May 03, 2014	Apr. 27, 2013	May 03, 2014	Apr. 27, 2013
Segment Reporting Information
Net revenues	$ 536,910	$ 538,784	$ 1,101,445	$ 1,127,513
Cost of revenues	182,618	204,672	374,483	419,476
Gross margin	354,292	334,112	726,962	708,037
SAN Products
Segment Reporting Information
Net revenues	321,164	319,088	676,620	680,822
Cost of revenues	84,514	87,897	177,455	184,850
Gross margin	236,650	231,191	499,165	495,972
IP Networking Products
Segment Reporting Information
Net revenues	121,116	132,658	240,865	273,171
Cost of revenues	57,757	76,702	118,443	154,124
Gross margin	63,359	55,956	122,422	119,047
Global Services
Segment Reporting Information
Net revenues	94,630	87,038	183,960	173,520
Cost of revenues	40,347	40,073	78,585	80,502
Gross margin	$ 54,283	$ 46,965	$ 105,375	$ 93,018