Segment Information Summary of Sales Activity to Countries that Represented Greater than 10% of Total Net Sales (Details)	3 Months Ended		6 Months Ended
	Jul. 27, 2014	Jul. 28, 2013	Jul. 27, 2014	Jul. 28, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Sales Revenue, Goods, Net [Member] | China Including Hong Kong [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	36.00%	32.00%	35.00%	33.00%
Sales Revenue, Goods, Net [Member] | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	15.00%	13.00%	15.00%
Sales Revenue, Goods, Net [Member] | Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	12.00%	13.00%	11.00%	12.00%
Sales Revenue, Goods, Net [Member] | South Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	8.00%	11.00%	10.00%	11.00%