Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Numerator
Consolidated net income	$ 4,639	$ 5,307
Consolidated net income attributable to noncontrolling interest	(152)	(203)
Consolidated net income attributable to Walmart	$ 4,487	$ 5,104
Denominator
Weighted-average common shares outstanding, basic (in shares)	8,011	8,053
Dilutive impact of share-based awards (in shares)	40	31
Weighted-average common shares outstanding, diluted (in shares)	8,051	8,084
Net income per common share attributable to Walmart
Basic (in dollars per share)	$ 0.56	$ 0.63
Diluted (in dollars per share)	$ 0.56	$ 0.63