Goodwill and Intangible Assets - Schedule of Finite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified													12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 27, 2013 Developed technology	Jan. 29, 2012 Developed technology	Jan. 27, 2013 Customer relationships	Jan. 29, 2012 Customer relationships	Jan. 27, 2013 Technology license		Jan. 29, 2012 Technology license		Jan. 27, 2013 Other intangible assets	Jan. 29, 2012 Other intangible assets	Jan. 27, 2013 Minimum Developed technology	Jan. 27, 2013 Minimum Customer relationships	Jan. 27, 2013 Minimum Technology license	Jan. 27, 2013 Minimum Other intangible assets	Jan. 27, 2013 Maximum Developed technology	Jan. 27, 2013 Maximum Customer relationships	Jan. 27, 2013 Maximum Technology license	Jan. 27, 2013 Maximum Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Estimated useful life													2 years	7 years	5 years	1 year	10 years	10 years	10 years	5 years
Gross Carrying Amount	$ 228,618	$ 81,030	$ 173,724	$ 65,900	$ 40,130	$ 12,130	$ 8,164	[1]	$ 3,000	[1]	$ 6,600	$ 0
Accumulated Amortization	(54,260)	(24,210)	(40,867)	(21,031)	(7,736)	(2,929)	(1,056)	[1]	(250)	[1]	(4,601)	0
Net Carrying Amount	$ 174,358	$ 56,820	$ 132,857	$ 44,869	$ 32,394	$ 9,201	$ 7,108	[1]	$ 2,750	[1]	$ 1,999	$ 0

[1] Technology licenses relate to licensing agreements entered into by the Company. Amortization expense related to technology licenses is reported as “Product development and engineering” in the consolidated statements of income.