Segment Information - Net Sales Activity by Geographic Region (Details) - Sales Revenue, Goods, Net [Member]	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 26, 2015	Jul. 31, 2016	Jul. 26, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	73.00%	73.00%	75.00%	73.00%
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	19.00%	16.00%	16.00%	17.00%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	8.00%	11.00%	9.00%	10.00%