Earnings per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 30, 2020	Nov. 01, 2019	Oct. 30, 2020	Nov. 01, 2019
Net Income
Basic Earnings	$ 574,260	$ 365,550	$ 2,012,307	$ 1,177,118
Diluted Earnings	$ 574,260	$ 365,550	$ 2,012,307	$ 1,177,118
Shares
Shares outstanding, basic	247,131	256,041	249,731	257,618
Effect of dilutive share-based awards	1,932	1,658	1,896	1,404
Shares outstanding, diluted	249,063	257,699	251,627	259,022
Per Share Amount
Basic earnings per share (in dollars per share)	$ 2.32	$ 1.43	$ 8.06	$ 4.57
Diluted earnings per share (in dollars per share)	$ 2.31	$ 1.42	$ 8.00	$ 4.54
Share-based awards outstanding excluded from computation of diluted earnings per share	100	100	200	400