Geographic Information And Concentration Of Risk (Net Sales Activity By Geographic Region) (Details)	3 Months Ended
	Apr. 29, 2012	May 01, 2011
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	100.00%	100.00%
North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	19.00%	27.00%
Asia-Pacific [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	65.00%	60.00%
Europe [Member]
Geographic Information And Concentration Of Risk [Line Items]
Total net sales, percentage	16.00%	13.00%