CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 27, 2014	Apr. 28, 2013
Revenue	$ 1,102,787,000	$ 954,739,000
Cost of revenue	498,585,000	436,171,000
Gross profit	604,202,000	518,568,000
Operating expenses
Research and development	334,263,000	327,161,000
Sales, general and administrative	118,580,000	108,626,000
Total operating expenses	452,843,000	435,787,000
Income from operations	151,359,000	82,781,000
Interest income	5,710,000	5,076,000
Interest Expense	11,471,000	853,000
Other income, net	17,684,000	1,058,000
Income before income tax expense	163,282,000	88,062,000
Income tax expense	26,766,000	10,171,000
Net income	136,516,000	77,891,000
Basic net income per share	$ 0.24	$ 0.13
Diluted net income per share	$ 0.24	$ 0.13
Shares used in basic per share computation	559,092	616,872
Shares used in diluted per share computation	570,422	619,302
Dividend per share, cash	$ 0.085	$ 0.075