Geographic Information and Concentration of Risk (Net Sales Activity By Geographic Region) (Details)	3 Months Ended		6 Months Ended
	Jul. 29, 2012	Jul. 31, 2011	Jul. 29, 2012	Jul. 31, 2011
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	100.00%	100.00%	100.00%	100.00%
North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	18.00%	25.00%	19.00%	26.00%
Asia-Pacific [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	69.00%	62.00%	67.00%	61.00%
Europe [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	13.00%	13.00%	14.00%	13.00%