Segments and Disaggregated Revenue (Revenue, International) (Details) - USD ($) $ in Millions	3 Months Ended
Apr. 30, 2024	Apr. 30, 2023
Revenue from External Customer [Line Items]
Net sales	$ 159,938	$ 151,004
Walmart International
Revenue from External Customer [Line Items]
Net sales	29,833	26,604
Mexico and Central America \| Walmart International
Revenue from External Customer [Line Items]
Net sales	13,232	10,958
Canada \| Walmart International
Revenue from External Customer [Line Items]
Net sales	5,328	5,140
China \| Walmart International
Revenue from External Customer [Line Items]
Net sales	5,443	4,924
Other \| Walmart International
Revenue from External Customer [Line Items]
Net sales	$ 5,830	$ 5,582

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details