CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 28, 2012	Oct. 30, 2011	Oct. 28, 2012	Oct. 30, 2011
Revenue	$ 1,204,110	$ 1,066,180	$ 3,173,257	$ 3,044,736
Cost of revenue	567,452	509,463	1,532,516	1,478,232
Gross profit	636,658	556,717	1,640,741	1,566,504
Operating expenses
Research and development	284,180	256,498	849,275	735,743
Sales, general and administrative	100,261	103,129	326,800	304,779
Total operating expenses	384,441	359,627	1,176,075	1,040,522
Income from operations	252,217	197,090	464,666	525,982
Interest income	4,701	4,356	15,215	14,936
Other income (expense), net	(3,290)	3,341	(3,950)	(2,099)
Income before income tax expense	253,628	204,787	475,931	538,819
Income tax expense	44,548	26,514	87,368	73,754
Net income	$ 209,080	$ 178,273	$ 388,563	$ 465,065
Basic net income per share	$ 0.34	$ 0.29	$ 0.63	$ 0.77
Shares used in basic per share computation (in shares)	622,352	607,063	619,043	600,563
Diluted net income per share	$ 0.33	$ 0.29	$ 0.62	$ 0.76
Shares used in diluted per share computation (in shares)	628,845	613,560	625,973	614,688