| Component: (Network and Table) | |
|---|---|
| Network | 2401406 - Disclosure - Summary Of Significant Accounting Policies (Summary Of Membership Fee Activity) (Details) (http://www.walmart.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfMembershipFeeActivityDetails) |
| Table | (Implied) |
| Reporting Entity [Axis] | 0000104169 (http://www.sec.gov/CIK) |
| Accounting Policies [Abstract] | Period [Axis] | ||
|---|---|---|---|
2012-02-01 - 2013-01-31 | 2011-02-01 - 2012-01-31 | 2010-02-01 - 2011-01-31 | |
Accounting Policies [Abstract] | |||
Deferred membership fee revenue, beginning of year | 559,000,000 | 542,000,000 | 532,000,000 |
Cash received from members | 1,133,000,000 | 1,111,000,000 | 1,074,000,000 |
Membership fee revenue recognized | (1,117,000,000) | (1,094,000,000) | (1,064,000,000) |
Deferred membership fee revenue, end of year | 575,000,000 | 559,000,000 | 542,000,000 |