Segments and Disaggregated Revenue (Narrative) (Details) $ in Millions	3 Months Ended
Apr. 30, 2024 USD ($) segment	Apr. 30, 2023 USD ($)
Disaggregation of Revenue [Line Items]
Number of reportable segments \| segment	3
Net sales	$ 159,938	$ 151,004
Walmart U.S.
Disaggregation of Revenue [Line Items]
Net sales	108,670	103,901
Walmart International
Disaggregation of Revenue [Line Items]
Net sales	29,833	26,604
Sam's Club
Disaggregation of Revenue [Line Items]
Net sales	21,435	20,499
eCommerce \| Walmart U.S.
Disaggregation of Revenue [Line Items]
Net sales	17,600	14,500
eCommerce \| Walmart International
Disaggregation of Revenue [Line Items]
Net sales	6,400	5,400
eCommerce \| Sam's Club
Disaggregation of Revenue [Line Items]
Net sales	$ 2,600	$ 2,200

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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+ Details