v3.25.3
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax, Sam's Club (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
Sam's Club U.S.        
Revenue from External Customer [Line Items]        
Net sales 23,550 22,851 69,252 67,139
Sam's Club U.S. | eCommerce        
Revenue from External Customer [Line Items]        
Net sales 3,800 3,100 10,800 8,700
Grocery | Sam's Club U.S.        
Revenue from External Customer [Line Items]        
Net sales 16,673 15,902 48,533 45,791
Fuel and other | Sam's Club U.S.        
Revenue from External Customer [Line Items]        
Net sales 2,976 3,187 8,891 10,043
General merchandise | Sam's Club U.S.        
Revenue from External Customer [Line Items]        
Net sales 2,551 2,469 7,964 7,796
Health and wellness | Sam's Club U.S.        
Revenue from External Customer [Line Items]        
Net sales $ 1,350 $ 1,293 $ 3,864 $ 3,509