Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 28, 2012	Oct. 30, 2011	Oct. 28, 2012	Oct. 30, 2011
Numerator:
Net income	$ 209,080	$ 178,273	$ 388,563	$ 465,065
Denominator:
Denominator for basic net income per share, weighted average shares (in shares)	622,352	607,063	619,043	600,563
Effect of dilutive securities:
Equity awards outstanding (in shares)	6,493	6,497	6,930	14,125
Denominator for diluted net income per share, weighted average shares (in shares)	628,845	613,560	625,973	614,688
Net income per share:
Basic net income per share	$ 0.34	$ 0.29	$ 0.63	$ 0.77
Diluted net income per share	$ 0.33	$ 0.29	$ 0.62	$ 0.76
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	27,555	25,131	31,697	22,033