Summary of Significant Accounting Policies - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 28,174	$ 29,014
Changes in currency translation and other	(68)	(1,475)
Acquisitions	7	635
Ending balance	28,113	28,174
Walmart U.S.
Goodwill [Roll Forward]
Beginning balance	3,374	2,941
Changes in currency translation and other	(10)	0
Acquisitions	0	433
Ending balance	3,364	3,374
Walmart International
Goodwill [Roll Forward]
Beginning balance	24,479	25,752
Changes in currency translation and other	(58)	(1,475)
Acquisitions	7	202
Ending balance	24,428	24,479
Sam's Club
Goodwill [Roll Forward]
Beginning balance	321	321
Changes in currency translation and other	0	0
Acquisitions	0	0
Ending balance	$ 321	$ 321