Net Sales (Details) - USD ($) $ in Millions	3 Months Ended
	May 03, 2020	May 05, 2019
Disaggregation of Revenue [Line Items]
Net sales	$ 28,260	$ 26,381
Products
Disaggregation of Revenue [Line Items]
Net sales	27,305	25,232
Services
Disaggregation of Revenue [Line Items]
Net sales	955	1,149
Building Materials
Disaggregation of Revenue [Line Items]
Net sales	9,816	9,404
Décor
Disaggregation of Revenue [Line Items]
Net sales	9,306	8,745
Hardlines
Disaggregation of Revenue [Line Items]
Net sales	9,138	8,232
In the U.S.
Disaggregation of Revenue [Line Items]
Net sales	26,418	24,453
Outside the U.S.
Disaggregation of Revenue [Line Items]
Net sales	$ 1,842	$ 1,928