Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax, International (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Revenue from External Customer [Line Items]
Net sales	$ 706,413	$ 674,538	$ 642,637
Walmart International
Revenue from External Customer [Line Items]
Net sales	130,423	121,885	114,641
Walmart International \| E Commerce
Revenue from External Customer [Line Items]
Net sales	35,800	29,500	24,800
Mexico and Central America \| Walmart International
Revenue from External Customer [Line Items]
Net sales	52,492	51,970	49,726
China \| Walmart International
Revenue from External Customer [Line Items]
Net sales	24,623	19,975	17,011
Canada \| Walmart International
Revenue from External Customer [Line Items]
Net sales	23,724	23,035	22,639
Other \| Walmart International
Revenue from External Customer [Line Items]
Net sales	$ 29,584	$ 26,905	$ 25,265

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