Geographic Information And Concentration Of Risk (Net Sales Activity By Geographic Region) (Details) (Concentration Of Net Sales [Member])	3 Months Ended		9 Months Ended
	Oct. 30, 2011	Oct. 31, 2010	Oct. 30, 2011	Oct. 31, 2010
Geographic Information And Concentration Of Risk [Line Items]
Net sales	100.00%	100.00%	100.00%	100.00%
North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Net sales	22.00%	24.00%	24.00%	25.00%
Asia-Pacific [Member]
Geographic Information And Concentration Of Risk [Line Items]
Net sales	63.00%	62.00%	62.00%	57.00%
Europe [Member]
Geographic Information And Concentration Of Risk [Line Items]
Net sales	15.00%	14.00%	14.00%	18.00%