Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified						12 Months Ended				12 Months Ended						12 Months Ended				12 Months Ended
	Jan. 26, 2014	Jan. 27, 2013	Jan. 29, 2012	Jan. 26, 2014 Developed technology	Jan. 27, 2013 Developed technology	Jan. 26, 2014 Developed technology Minimum	Jan. 26, 2014 Developed technology Maximum	Jan. 26, 2014 Customer relationships	Jan. 27, 2013 Customer relationships	Jan. 26, 2014 Customer relationships Minimum	Jan. 26, 2014 Customer relationships Maximum	Jan. 26, 2014 Core Technologies		Jan. 27, 2013 Core Technologies		Jan. 26, 2014 Core Technologies Minimum	Jan. 26, 2014 Core Technologies Maximum	Jan. 26, 2014 Other intangible assets	Jan. 27, 2013 Other intangible assets	Jan. 26, 2014 Other intangible assets Minimum	Jan. 26, 2014 Other intangible assets Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life						2 years	10 years			7 years	10 years					5 years	10 years			1 year	5 years
Gross Carrying Amount	$ 185,997	$ 228,618	$ 81,030	$ 146,925	$ 173,724			$ 28,630	$ 40,130			$ 3,842	[1]	$ 8,164	[1]			$ 6,600	$ 6,600
Accumulated Amortization	(49,053)	(54,260)		(35,357)	(40,867)			(7,505)	(7,736)			(367)	[1]	(1,056)	[1]			(5,824)	(4,601)
Net Carrying Amount	$ 136,944	$ 174,358		$ 111,568	$ 132,857			$ 21,125	$ 32,394			$ 3,475	[1]	$ 7,108	[1]			$ 776	$ 1,999

[1] Technology licenses relate to licensing agreements entered into by the Company that are used in research and development activities and have alternative future uses. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of operations.