Summary of Significant Accounting Policies (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Goodwill [Roll Forward]
Goodwill	$ 29,014	$ 28,983
Changes in currency translation and other	(1,475)	(415)
Acquisitions	635	446
Goodwill	28,174	29,014
Walmart U.S.
Goodwill [Roll Forward]
Goodwill	2,941	2,696
Changes in currency translation and other	0	0
Acquisitions	433	245
Goodwill	3,374	2,941
Walmart International
Goodwill [Roll Forward]
Goodwill	25,752	25,966
Changes in currency translation and other	(1,475)	(415)
Acquisitions	202	201
Goodwill	24,479	25,752
Sam's Club
Goodwill [Roll Forward]
Goodwill	321	321
Changes in currency translation and other	0	0
Acquisitions	0	0
Goodwill	$ 321	$ 321