CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Jan. 30, 2011
Revenue	$ 4,280,159	$ 3,997,930	$ 3,543,309
Cost of revenue	2,053,816	1,941,413	2,134,219
Gross profit	2,226,343	2,056,517	1,409,090
Operating expenses
Research and development	1,147,282	1,002,605	848,830
Sales, general and administrative	430,822	405,613	361,513
Legal Settlement	0	0	(57,000)
Total operating expenses	1,578,104	1,408,218	1,153,343
Income from operations	648,239	648,299	255,747
Interest income	19,908	19,149	19,057
Interest expense	(3,294)	(3,089)	(3,127)
Other expense, net	(2,814)	(963)	(508)
Income before income tax	662,039	663,396	271,169
Income tax expense	99,503	82,306	18,023
Net income	$ 562,536	$ 581,090	$ 253,146
Basic net income per share	$ 0.91	$ 0.96	$ 0.44
Shares used in basic per share computation (in shares)	619,324	603,646	575,177
Diluted net income per share	$ 0.90	$ 0.94	$ 0.43
Shares used in diluted per share computation (in shares)	624,957	616,371	588,684
Cash Dividends, Per Share, Declared	$ 0.075	$ 0.000	$ 0.000