Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2013	Oct. 28, 2012	Oct. 27, 2013	Oct. 28, 2012
Numerator:
Net income	$ 118,734	$ 209,080	$ 293,073	$ 388,563
Denominator:
Denominator for basic net income per share, weighted average shares	580,870	622,352	594,363	619,043
Effect of dilutive securities:
Equity awards outstanding	7,882	6,493	5,745	6,930
Denominator for diluted net income per share, weighted average shares	588,752	628,845	600,108	625,973
Net income per share:
Basic net income per share	$ 0.20	$ 0.34	$ 0.49	$ 0.63
Diluted net income per share	$ 0.20	$ 0.33	$ 0.49	$ 0.62
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	21,870	27,555	27,351	31,697