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Calculation of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011
Capital Stock And Earnings Per Share [Abstract]
Basic earnings per share, Net income	$ 461,551	$ 406,487	$ 1,301,843	$ 1,020,776
Weighted average common shares outstanding for basic EPS	731,575	754,273	736,846	764,648
Basic earnings per share	$ 0.63	$ 0.54	$ 1.77	$ 1.33
Diluted earnings per share, Net income	$ 461,551	$ 406,487	$ 1,301,843	$ 1,020,776
Weighted average common shares outstanding for basic EPS	731,575	754,273	736,846	764,648
Assumed exercise/vesting of Stock options and awards	14,166	11,779	14,188	12,330
Weighted average common shares outstanding for diluted EPS	745,741	766,052	751,034	776,978
Diluted earnings per share	$ 0.62	$ 0.53	$ 1.73	$ 1.31

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