v3.26.1
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax, International (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales $ 186,100 $ 175,750 $ 361,784 $ 339,731
Walmart International        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales 35,198 31,201 70,307 60,955
Walmart International | eCommerce        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales 9,900 8,300 19,600 16,000
Walmart International | Mexico and Central America        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales 14,331 12,546 28,178 24,260
Walmart International | China        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales 7,416 5,786 15,870 12,365
Walmart International | Canada        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales 6,379 6,114 12,106 11,259
Walmart International | Other        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Net sales $ 7,072 $ 6,755 $ 14,153 $ 13,071