Segments and Disaggregated Revenue - Segment Revenues and Long-Lived Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 648,125	$ 611,289	$ 572,754
Total long-lived assets	130,338	119,234	112,624
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	532,076	508,685	470,295
Total long-lived assets	104,480	95,567	89,795
Walmart International
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	116,049	102,604	102,459
Total long-lived assets	$ 25,858	$ 23,667	$ 22,829