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Derivative Financial Instruments (Balance Sheet Classification of Financial Instruments) (Details)1falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote5RestructuringCharges1114Note 5. Restructuring Charges10501 - Disclosure - Note 5. Restructuring Charges0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote4ShareBasedCompensationSummaryOfRestrictedStockAndPerformanceShareAwardActivityDetails1455Note 4. Share-Based Compensation (Summary of Restricted Stock And Performance Share Award Activity) (Details)40405 - Disclosure - Note 4. Share-Based Compensation (Summary of Restricted Stock And Performance Share Award Activity) (Details)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote17SubsequentEventsAnnualDividendRecordDateAndPayableDateDetails1490Note 17. Subsequent Events (Annual Dividend Record Date and Payable Date) (Details)41702 - Disclosure - Note 17. 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Restructuring Charges (Tables)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote15AcquisitionsInvestmentsAndDisposalsDisposalsNarrativeDetails1485Note 15. Acquisitions, Investments and Disposals (Disposals Narrative) (Details)41504 - Disclosure - Note 15. Acquisitions, Investments and Disposals (Disposals Narrative) (Details)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote8FairValueMeasurementsTables1336Note 8. Fair Value Measurements (Tables)30803 - Disclosure - Note 8. Fair Value Measurements (Tables)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote10TaxesNarrativeDetails1470Note 10. Taxes (Narrative) (Details)41001 - Disclosure - Note 10. Taxes (Narrative) (Details)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote7ShortTermBorrowingsAndLongTermDebt1116Note 7. Short-term Borrowings and Long-term Debt10701 - Disclosure - Note 7. 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Quarterly Financial Data (Unaudited) (Tables)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote18QuarterlyFinancialDataUnauditedQuarterlyFinancialDataDetails1491Note 18. Quarterly Financial Data (Unaudited) (Quarterly Financial Data) (Details)41801 - Disclosure - Note 18. Quarterly Financial Data (Unaudited) (Quarterly Financial Data) (Details)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote18QuarterlyFinancialDataUnauditedCondensedFinancialStatementsDetails1492Note 18. Quarterly Financial Data (Unaudited) (Condensed Financial Statements) (Details)41802 - Disclosure - Note 18. Quarterly Financial Data (Unaudited) (Condensed Financial Statements) (Details)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote18QuarterlyFinancialDataUnaudited1127Note 18. Quarterly Financial Data (Unaudited)11801 - Disclosure - Note 18. Quarterly Financial Data (Unaudited)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote16SegmentsReconciliationToConsolidatedIncomeFromContinuingOperationsBeforeIncomeTaxesDetails1488Note 16. Segments (Reconciliation to Consolidated Income from Continuing Operations Before Income Taxes) (Details)41602 - Disclosure - Note 16. Segments (Reconciliation to Consolidated Income from Continuing Operations Before Income Taxes) (Details)4falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/StatementComprehensiveIncomeParentheticalAudited28Comprehensive Income (Parenthetical) (Audited)00410 - Statement - Comprehensive Income (Parenthetical) (Audited)0falsesec:0001193125-11-083157:http://www.walmartstores.com/taxonomy/role/DisclosureNote11AccumulatedOtherComprehensiveIncomeLoss1120Note 11. Accumulated Other Comprehensive Income (Loss)11101 - Disclosure - Note 11. 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