Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 27, 2013	Apr. 28, 2012	Apr. 27, 2013	Apr. 28, 2012
Net revenues
Product	$ 451,746	$ 456,104	$ 953,993	$ 932,406
Service	87,038	87,335	173,520	171,675
Total net revenues	538,784	543,439	1,127,513	1,104,081
Cost of revenues
Product	164,599	164,177	338,974	339,584
Service	40,073	42,180	80,502	82,646
Total cost of revenues	204,672	206,357	419,476	422,230
Gross margin	334,112	337,082	708,037	681,851
Operating expenses:
Research and development	98,429	92,931	196,119	182,250
Sales and marketing	145,316	158,855	294,327	311,543
General and administrative	20,037	18,790	39,114	37,140
Amortization of intangible assets	13,151	14,737	28,007	29,730
Total operating expenses	276,933	285,313	557,567	560,663
Income from operations	57,179	51,769	150,470	121,188
Interest expense	(10,432)	(12,729)	(36,800)	(25,775)
Interest and other income (loss), net	31	(452)	97	(1,448)
Income before income tax	46,778	38,588	113,767	93,965
Income tax expense (benefit)	(171)	(708)	88,073	(3,915)
Net income	$ 46,949	$ 39,296	$ 25,694	$ 97,880
Net income per share — basic	$ 0.10	$ 0.09	$ 0.06	$ 0.22
Net income per share — diluted	$ 0.10	$ 0.08	$ 0.06	$ 0.21
Shares used in per share calculation — basic	453,133	457,541	453,988	455,017
Shares used in per share calculation — diluted	466,919	476,848	466,620	472,793