v3.25.4
Segments and Disaggregated Revenue - Revenue from Contract with Customer Excluding Assessed Tax Walmart U.S (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 31, 2026
Jan. 31, 2025
Jan. 31, 2024
Revenue from External Customer [Line Items]      
Net sales $ 706,413 $ 674,538 $ 642,637
Walmart U.S.      
Revenue from External Customer [Line Items]      
Net sales 482,975 462,415 441,817
Walmart U.S. | E Commerce      
Revenue from External Customer [Line Items]      
Net sales 99,600 79,300 65,400
Grocery | Walmart U.S.      
Revenue from External Customer [Line Items]      
Net sales 285,482 276,003 264,210
General merchandise | Walmart U.S.      
Revenue from External Customer [Line Items]      
Net sales 115,060 113,921 113,985
Health and wellness | Walmart U.S.      
Revenue from External Customer [Line Items]      
Net sales 69,547 62,092 54,898
Other | Walmart U.S.      
Revenue from External Customer [Line Items]      
Net sales $ 12,886 $ 10,399 $ 8,724