CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock Outstanding	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balances, at Jan. 29, 2012	$ 4,145,724	$ 700	$ 2,900,896	$ (1,496,904)	$ 10,614	$ 2,730,418
Beginning common stock, shares, outstanding at Jan. 29, 2012		612,191
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	(633)				(633)
Net income	562,536					562,536
Issuance of common stock from stock plans, shares		14,801
Issuance of common stock from stock plans, value	90,741	20	90,721	0
Tax withholding related to vesting of restricted stock units, shares		(1,836)
Tax withholding related to vesting of restricted stock units, value	(25,805)			(25,805)
Tax benefit from stock-based compensation	64,905		64,905
Share repurchase, shares		(8,400)
Share repurchase, value	(100,000)			(100,000)
Cash dividends declared and paid	(46,866)					(46,866)
Purchase of convertible note hedges	0
Proceeds from the sale of common stock warrants	0
Stock-based compensation	137,101		137,101
Balances, at Jan. 27, 2013	4,827,703	720	3,193,623	(1,622,709)	9,981	3,246,088
Ending common stock, shares, outstanding at Jan. 27, 2013		616,756
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	(5,104)				(5,104)
Net income	439,990					439,990
Issuance of common stock from stock plans, shares		15,089
Issuance of common stock from stock plans, value	97,454	12	97,442	0
Tax withholding related to vesting of restricted stock units, shares		(1,944)
Tax withholding related to vesting of restricted stock units, value	(27,282)			(27,282)
Tax benefit from stock-based compensation	23,827		23,827
Share repurchase, shares		(61,904)
Share repurchase, value	(887,304)			(887,304)
Cash dividends declared and paid	(181,336)					(181,336)
Discount on convertible notes	125,725		125,725
Purchase of convertible note hedges	(167,100)		(167,100)
Proceeds from the sale of common stock warrants	59,100		59,100
Deferred tax asset associated with convertible notes	14,481		14,481
Stock-based compensation	136,244		136,244
Balances, at Jan. 26, 2014	4,456,398	732	3,483,342	(2,537,295)	4,877	3,504,742
Ending common stock, shares, outstanding at Jan. 26, 2014	567,997	567,997
Increase (Decrease) in Shareholders' Equity
Other comprehensive income (loss)	2,967				2,967
Net income	630,587					630,587
Issuance of common stock from stock plans, shares		23,629
Issuance of common stock from stock plans, value	197,156	22	197,140	6
Tax withholding related to vesting of restricted stock units, shares		(2,326)
Tax withholding related to vesting of restricted stock units, value	(43,684)			(43,684)
Tax benefit from stock-based compensation	16,625		16,625
Share repurchase, shares		(44,387)
Share repurchase, value	(813,600)			(813,600)
Cash dividends declared and paid	(186,452)					(186,452)
Discount on convertible notes	125,725
Purchase of convertible note hedges	0
Proceeds from the sale of common stock warrants	0
Stock-based compensation	157,985		157,985
Balances, at Jan. 25, 2015	$ 4,417,982	$ 754	$ 3,855,092	$ (3,394,585)	$ 7,844	$ 3,948,877
Ending common stock, shares, outstanding at Jan. 25, 2015	544,913	544,913