Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
May 03, 2019	May 04, 2018
Net Income
Basic Earnings	$ 385,013	$ 364,852
Diluted Earnings	$ 385,013	$ 364,852
Shares
Shares outstanding, basic	259,021	268,267
Effect of dilutive share-based awards	1,244	868
Shares outstanding, diluted	260,265	269,135
Per Share Amount
Basic earnings per share (in dollars per share)	$ 1.49	$ 1.36
Diluted earnings per share (in dollars per share)	$ 1.48	$ 1.36
Share-based awards outstanding excluded from computation of diluted earnings per share	600	900

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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