v3.25.3
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax, International (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 International        
Revenue from External Customer [Line Items]        
Net sales 33,541 30,277 94,496 89,677
Walmart International | eCommerce        
Revenue from External Customer [Line Items]        
Net sales 10,200 8,100 26,100 21,300
Mexico and Central America | Walmart International        
Revenue from External Customer [Line Items]        
Net sales 12,869 12,064 37,129 38,395
China | Walmart International        
Revenue from External Customer [Line Items]        
Net sales 6,110 5,012 18,475 14,895
Canada | Walmart International        
Revenue from External Customer [Line Items]        
Net sales 6,004 5,803 17,263 17,022
Other | Walmart International        
Revenue from External Customer [Line Items]        
Net sales $ 8,558 $ 7,398 $ 21,629 $ 19,365