Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Numerator
Consolidated net income	$ 5,307	$ 1,896
Consolidated net income attributable to noncontrolling interest	(203)	(223)
Consolidated net income attributable to Walmart	$ 5,104	$ 1,673
Denominator
Weighted-average common shares outstanding, basic (in shares)	8,053	8,082
Dilutive impact of share-based awards (in shares)	31	30
Weighted-average common shares outstanding, diluted (in shares)	8,084	8,112
Net income per common share attributable to Walmart
Basic (in dollars per share)	$ 0.63	$ 0.21
Diluted (in dollars per share)	$ 0.63	$ 0.21