v3.25.1
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax Walmart U.S (Details) - USD ($)
$ in Millions
 3 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Revenue from External Customer [Line Items]    
Net sales $ 163,981 $ 159,938
Walmart U.S.    
Revenue from External Customer [Line Items]    
Net sales 112,163 108,670
Walmart U.S. | eCommerce    
Revenue from External Customer [Line Items]    
Net sales 21,400 17,600
Grocery | Walmart U.S.    
Revenue from External Customer [Line Items]    
Net sales 67,831 66,431
General merchandise | Walmart U.S.    
Revenue from External Customer [Line Items]    
Net sales 25,276 25,711
Health and wellness | Walmart U.S.    
Revenue from External Customer [Line Items]    
Net sales 16,244 14,249
Other categories | Walmart U.S.    
Revenue from External Customer [Line Items]    
Net sales $ 2,812 $ 2,279