CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Revenue	$ 3,997,930	$ 3,543,309	$ 3,326,445
Cost of revenue	1,941,413	2,134,219	2,149,522
Gross profit	2,056,517	1,409,090	1,176,923
Operating expenses
Research and development	1,002,605	848,830	908,851
Sales, general and administrative	405,613	361,513	367,017
Litigation Settlement		(57,000)
Total operating expenses	1,408,218	1,153,343	1,275,868
Income from operations	648,299	255,747	(98,945)
Interest income	19,149	19,057	23,115
Interest Expense	(3,089)	(3,127)	(3,320)
Other income (expense), net	(963)	(508)	(3,144)
Income before income tax expense	663,396	271,169	(82,294)
Income tax expense (benefit)	82,306	18,023	(14,307)
Net income (loss)	$ 581,090	$ 253,146	$ (67,987)
Basic net income (loss) per share	$ 0.96	$ 0.44	$ (0.12)
Shares used in basic per share computation (in shares)	603,646	575,177	549,574
Diluted net income (loss) per share	$ 0.94	$ 0.43	$ (0.12)
Shares used in diluted per share computation (in shares)	616,371	588,684	549,574