CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 26, 2014	Jan. 27, 2013	Jan. 29, 2012
Revenue	$ 4,130,162	$ 4,280,159	$ 3,997,930
Cost of revenue	1,862,399	2,053,816	1,941,413
Gross profit	2,267,763	2,226,343	2,056,517
Operating expenses
Research and development	1,335,834	1,147,282	1,002,605
Sales, general and administrative	435,702	430,822	405,613
Total operating expenses	1,771,536	1,578,104	1,408,218
Income from operations	496,227	648,239	648,299
Interest income	17,119	19,908	19,149
Interest expense	(10,443)	(3,294)	(3,089)
Other income (expense), net	7,351	(2,814)	(963)
Income before income tax	510,254	662,039	663,396
Income tax expense	70,264	99,503	82,306
Net income	$ 439,990	$ 562,536	$ 581,090
Basic net income per share	$ 0.75	$ 0.91	$ 0.96
Diluted net income per share	$ 0.74	$ 0.90	$ 0.94
Shares used in basic per share computation (in shares)	587,893	619,324	603,646
Shares used in diluted per share computation (in shares)	594,517	624,957	616,371
Cash Dividends, Per Share, Declared and Paid	$ 0.310	$ 0.075	$ 0