Geographic Information and Concentration of Risk - Summary of Sales Activity to Countries that Represent Greater than 10% of Total Net Sales (Details) (Net sales revenue)	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%
Minimum concentration risk threshold	10.00%
Geographic concentration risk
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	69.00%	74.00%	74.00%
Geographic concentration risk | United States
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	17.00%	20.00%	23.00%
Geographic concentration risk | China (including Hong Kong)
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	35.00%	38.00%	34.00%
Geographic concentration risk | Japan
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	10.00%	8.00%	7.00%
Geographic concentration risk | South Korea
Geographic Information And Concentration Of Risk [Line Items]
Concentration risk, percentage	7.00%	8.00%	10.00%