CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 26, 2014	Oct. 27, 2013	Oct. 26, 2014	Oct. 27, 2013
Revenue	$ 1,225,382	$ 1,053,967	$ 3,430,993	$ 2,985,944
Cost of revenue	548,684	469,552	1,531,119	1,337,423
Gross profit	676,698	584,415	1,899,874	1,648,521
Operating expenses
Research and development	340,085	340,294	1,011,472	999,193
Sales, general and administrative	123,298	103,133	360,549	320,025
Total operating expenses	463,383	443,427	1,372,021	1,319,218
Income from operations	213,315	140,988	527,853	329,303
Interest income	7,422	4,022	19,961	12,963
Interest expense	11,542	819	34,539	2,508
Other income (expense), net	(125)	(2,707)	13,702	1,608
Income before income tax expense	209,070	141,484	526,977	341,366
Income tax expense	36,103	22,750	89,518	48,293
Net income	$ 172,967	$ 118,734	$ 437,459	$ 293,073
Basic net income per share	$ 0.32	$ 0.20	$ 0.79	$ 0.49
Diluted net income per share	$ 0.31	$ 0.20	$ 0.77	$ 0.49
Shares used in basic per share computation	547,789	580,870	555,035	594,363
Shares used in diluted per share computation	558,201	588,752	565,653	600,108
Cash dividends declared and paid per common share	$ 0.085	$ 0.075	$ 0.255	$ 0.225