CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2013	Oct. 28, 2012	Oct. 27, 2013	Oct. 28, 2012
Revenue	$ 1,053,967	$ 1,204,110	$ 2,985,944	$ 3,173,257
Cost of revenue	469,552	567,452	1,337,423	1,532,516
Gross profit	584,415	636,658	1,648,521	1,640,741
Operating expenses
Research and development	340,294	284,180	999,193	849,275
Sales, general and administrative	103,133	100,261	320,025	326,800
Total operating expenses	443,427	384,441	1,319,218	1,176,075
Income from operations	140,988	252,217	329,303	464,666
Interest income	4,022	4,701	12,963	15,215
Other expense, net	(3,526)	(3,290)	(900)	(3,950)
Income before income tax expense	141,484	253,628	341,366	475,931
Income tax expense	22,750	44,548	48,293	87,368
Net income	$ 118,734	$ 209,080	$ 293,073	$ 388,563
Basic net income per share	$ 0.20	$ 0.34	$ 0.49	$ 0.63
Shares used in basic per share computation	580,870	622,352	594,363	619,043
Diluted net income per share	$ 0.20	$ 0.33	$ 0.49	$ 0.62
Shares used in diluted per share computation	588,752	628,845	600,108	625,973
Common Stock, Dividends, Per Share, Cash Paid	$ 0.075	$ 0	$ 0.225	$ 0