Segments and Disaggregated Revenue (Segment Revenues and Long-Lived Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 611,289	$ 572,754	$ 559,151
Total long-lived assets	119,234	112,624	109,848
U.S.
Segment Reporting Information [Line Items]
Total revenues	508,685	470,295	436,649
Total long-lived assets	95,567	89,795	87,068
Walmart International
Segment Reporting Information [Line Items]
Total revenues	102,604	102,459	122,502
Total long-lived assets	$ 23,667	$ 22,829	$ 22,780