Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 04, 2019	Jul. 29, 2018	Aug. 04, 2019	Jul. 29, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 30,839	$ 30,463	$ 57,220	$ 55,410
Products
Disaggregation of Revenue [Line Items]
Net sales	29,480	29,076	54,712	52,811
Services
Disaggregation of Revenue [Line Items]
Net sales	1,359	1,387	2,508	2,599
Building Materials
Disaggregation of Revenue [Line Items]
Net sales	10,495	10,660	19,899	19,981
Décor
Disaggregation of Revenue [Line Items]
Net sales	10,050	9,653	18,795	18,066
Hardlines
Disaggregation of Revenue [Line Items]
Net sales	10,294	10,150	18,526	17,363
In the U.S.
Disaggregation of Revenue [Line Items]
Net sales	28,186	27,852	52,639	50,895
Outside the U.S.
Disaggregation of Revenue [Line Items]
Net sales	$ 2,653	$ 2,611	$ 4,581	$ 4,515