Segment Information (Schedule Of Financial Information By Reportable Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Segment Reporting Information [Line Items]
Net revenues	$ 560,642	$ 545,756
Cost of revenues	215,873	224,873
Gross margin	344,769	320,883
Data Storage Products [Member]
Segment Reporting Information [Line Items]
Net revenues	352,872	330,903
Cost of revenues	95,838	100,472
Gross margin	257,034	230,431
Ethernet Products [Member]
Segment Reporting Information [Line Items]
Net revenues	123,430	126,126
Cost of revenues	79,569	77,144
Gross margin	43,861	48,982
Global Services [Member]
Segment Reporting Information [Line Items]
Net revenues	84,340	88,727
Cost of revenues	40,466	47,257
Gross margin	$ 43,874	$ 41,470