CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 29, 2012	Jul. 31, 2011	Jul. 29, 2012	Jul. 31, 2011
Revenue	$ 1,044,270	$ 1,016,517	$ 1,969,147	$ 1,978,556
Cost of revenue	503,551	491,233	965,064	968,769
Gross profit	540,719	525,284	1,004,083	1,009,787
Operating expenses
Research and development	281,193	247,721	565,095	479,245
Sales, general and administrative	119,903	103,533	226,539	201,650
Total operating expenses	401,096	351,254	791,634	680,895
Income from operations	139,623	174,030	212,449	328,892
Interest income	5,316	5,266	10,514	10,579
Other income (expense), net	269	(1,749)	(660)	(5,439)
Income before income tax expense	145,208	177,547	222,303	334,032
Income tax expense	26,162	25,974	42,820	47,240
Net income	$ 119,046	$ 151,573	$ 179,483	$ 286,792
Basic net income per share	$ 0.19	$ 0.25	$ 0.29	$ 0.48
Shares used in basic per share computation (in shares)	618,996	601,340	617,388	598,077
Diluted net income per share	$ 0.19	$ 0.25	$ 0.29	$ 0.47
Shares used in diluted per share computation (in shares)	623,143	613,934	623,397	615,552