CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 26, 2014	Jan. 27, 2013	Jan. 29, 2012
Cash flows from operating activities:
Net income	$ 439,990	$ 562,536	$ 581,090
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	239,148	226,235	204,205
Amortization of Debt Discount	4,600
Gains on sale of long-lived assets and investment	(10,471)
Share-based Compensation	136,295	136,662	136,354
Deferred income taxes	15,430	31,860	19,056
Excess Tax benefit from stock based compensation	(25,801)	(68,710)	(52,793)
Other	23,718	47,911	19,095
Changes in operating assets and liabilities
Accounts receivable	28,852	(118,940)	26,236
Inventories	24,651	(78,949)	18,884
Prepaid expenses and other current assets	6,729	(20,290)	(14,803)
Deposits and other assets	4,823	8,567	(70,694)
Accounts payable	(20,382)	10,885	35,708
Accrued liabilities and other long-term liabilities	(32,436)	86,405	6,818
Net cash provided by operating activities	835,146	824,172	909,156
Cash flows from investing activities:
Purchases of marketable securities	(3,065,404)	(2,378,445)	(1,964,898)
Proceeds from Sale of Available-for-sale Securities	1,926,817	854,993	656,171
Proceeds from maturities of marketable securities	585,150	962,417	654,572
Purchases of property and equipment and intangible assets	(255,186)	(183,309)	(138,735)
Proceeds from sale of long-lived assets and investments	24,781	0	0
Acquisition of businesses, net of cash acquired	(17,145)	0	(348,884)
Other	(4,950)	352	(1,590)
Net cash used in investing activities	(805,937)	(743,992)	(1,143,364)
Cash flows from financing activities:
Proceeds from Convertible Debt	1,477,500	0	0
Payments for Hedge	(167,100)	0	0
Proceeds from Issuance of Warrants	59,100	0	0
Proceeds from issuance of stock under employee stock plans	70,170	64,935	195,857
Payments for Repurchase of Common Stock	(887,304)	(100,000)	0
Payments of Dividends	(181,336)	(46,866)	0
Excess Tax benefit from Stock based compensation	25,801	68,710	52,793
Payments under capital lease obligations	(2,239)	(2,049)	(1,608)
Other	(5,000)	0	(10,319)
Net cash (used in) provided by financing activities	389,592	(15,270)	236,723
Change in cash and cash equivalents	418,801	64,910	2,515
Cash and cash equivalents at beginning of period	732,786	667,876	665,361
Cash and cash equivalents at end of period	1,151,587	732,786	667,876
Supplemental disclosures of cash flow information:
Cash (received) paid for income taxes, net	14,615	(38,608)	58,328
Cash paid for Intereston capital lease obligations	2,518	2,772	3,008
Other non-cash activities:
Change in unrealized gain (loss) from marketable securities	(5,104)	(633)	342
Assets acquired by assuming related liabilities	$ 3,327	$ 45,195	$ 15,913