Segment reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 30, 2020 USD ($) segment	Nov. 01, 2019 USD ($) segment	Oct. 30, 2020 USD ($) segment	Nov. 01, 2019 USD ($) segment
Net sales data for classes of similar products
Net sales	$ 8,199,625	$ 6,991,393	$ 25,332,315	$ 20,596,331
Number of reportable segments
Number of reportable operating segments | segment	1	1	1	1
Consumables
Net sales data for classes of similar products
Net sales	$ 6,385,315	$ 5,523,157	$ 19,585,114	$ 16,164,317
Seasonal
Net sales data for classes of similar products
Net sales	906,623	750,843	2,986,146	2,341,914
Home products
Net sales data for classes of similar products
Net sales	517,147	400,934	1,601,450	1,151,715
Apparel
Net sales data for classes of similar products
Net sales	$ 390,540	$ 316,459	$ 1,159,605	$ 938,385