| Component: (Network and Table) | |
|---|---|
| Network | 2406402 - Disclosure - Accrued Liabilities (Summary Of Accrued Liabilities) (Details) (http://www.walmart.com/role/AccruedLiabilitiesSummaryOfAccruedLiabilitiesDetails) | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0000104169 (http://www.sec.gov/CIK) | 
| Accrued Liabilities [Abstract] | Period [Axis] | |
|---|---|---|
| 2013-01-31 | 2012-01-31 | |
| Accrued Liabilities [Abstract] | ||
| Accrued wages and benefits | 5,059,000,000 1 | 5,089,000,000 1 | 
| Self Insurance Reserve | 3,373,000,000 3 | 3,638,000,000 3 | 
| Accrued taxes | 2,851,000,000 4 | 2,323,000,000 4 | 
| Other | 7,525,000,000 2 | 7,130,000,000 2 | 
| Total accrued liabilities | 18,808,000,000   | 18,180,000,000   |