Segment reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2021 USD ($) segment	Jul. 31, 2020 USD ($) segment	Jul. 30, 2021 USD ($) segment	Jul. 31, 2020 USD ($) segment
Net sales data for classes of similar products
Net sales	$ 8,650,198	$ 8,684,241	$ 17,051,162	$ 17,132,690
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	$ 6,612,950	$ 6,496,350	$ 12,991,085	$ 13,199,799
Seasonal
Net sales data for classes of similar products
Net sales	1,090,311	1,161,611	2,140,693	2,079,523
Home products
Net sales data for classes of similar products
Net sales	561,190	586,021	1,132,505	1,084,303
Apparel
Net sales data for classes of similar products
Net sales	$ 385,747	$ 440,259	$ 786,879	$ 769,065