v3.25.3
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax Walmart U.S (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Oct. 31, 2025
Oct. 31, 2024
Revenue from External Customer [Line Items]        
Net sales $ 177,769 $ 168,003 $ 517,500 $ 495,708
Walmart U.S.        
Revenue from External Customer [Line Items]        
Net sales 120,678 114,875 353,752 338,892
Walmart U.S. | eCommerce        
Revenue from External Customer [Line Items]        
Net sales 24,800 19,500 70,000 56,000
Grocery | Walmart U.S.        
Revenue from External Customer [Line Items]        
Net sales 71,713 69,344 210,636 204,455
General merchandise | Walmart U.S.        
Revenue from External Customer [Line Items]        
Net sales 27,366 26,621 82,100 81,312
Health and wellness | Walmart U.S.        
Revenue from External Customer [Line Items]        
Net sales 18,379 16,360 51,871 45,639
Other categories | Walmart U.S.        
Revenue from External Customer [Line Items]        
Net sales $ 3,220 $ 2,550 $ 9,145 $ 7,486