Earnings per share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Aug. 04, 2017	Jul. 29, 2016	Aug. 04, 2017	Jul. 29, 2016
Net Income
Basic Earnings	$ 294,783	$ 306,518	$ 574,272	$ 601,642
Diluted Earnings	$ 294,783	$ 306,518	$ 574,272	$ 601,642
Shares
Shares outstanding, basic	273,690	283,130	274,191	284,508
Effect of dilutive share-based awards	442	986	483	1,039
Shares outstanding, diluted	274,132	284,116	274,674	285,547
Per Share Amount
Basic earnings per share (in dollars per share)	$ 1.08	$ 1.08	$ 2.09	$ 2.11
Diluted earnings per share (in dollars per share)	$ 1.08	$ 1.08	$ 2.09	$ 2.11
Share-based awards outstanding excluded from computation of diluted earnings per share	2,600	1,300	2,600	1,400

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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