2.2.0.25truefalse41501 - Disclosure - Note 15. Acquisitions, Investments and Disposals (Bounteous Company Narrative) (Details)truefalseIn Millions, unless otherwise specifiedfalse1falsefalseUSDtruefalse{wmt_PaymentTypeByAcquisitionAxis} : Initial interest [Member] {us-gaap_BusinessAcquisitionAxis} : Bounteous Company Limited [Member] 2/28/2007 USD ($) $As_Of_2_28_20072http://www.sec.gov/CIK0000104169instant2007-02-28T00:00:000001-01-01T00:00:00falsefalseInitial interest [Member]wmt_PaymentTypeByAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_InitialInterestMemberwmt_PaymentTypeByAcquisitionAxisexplicitMemberfalsefalseBounteous Company Limited [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_BounteousCompanyLimitedMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit15Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$1false0us-gaap_EquityMethodInvestmentOwnershipPercentageus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.350.35falsefalsefalsefalsefalseOtherus-types:percentItemTypepureThe percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) falsefalse2false0us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquiredus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruefalse0.30.3falsefalsefalsefalsefalseOtherus-types:percentItemTypepurePercentage of voting equity interests acquired in the business combination.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph c falsefalse3false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.walmartstores.com/taxonomy/role/disclosurenote15acquisitionsinvestmentsanddisposalsbounteouscompanynarrativedetails1falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{wmt_PaymentTypeByAcquisitionAxis} : Initial interest [Member] {us-gaap_BusinessAcquisitionAxis} : Bounteous Company Limited [Member] 2/28/2007 USD ($) $As_Of_2_28_20072http://www.sec.gov/CIK0000104169instant2007-02-28T00:00:000001-01-01T00:00:00falsefalseInitial interest [Member]wmt_PaymentTypeByAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_InitialInterestMemberwmt_PaymentTypeByAcquisitionAxisexplicitMemberfalsefalseBounteous Company Limited [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_BounteousCompanyLimitedMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit15Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse4false0us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaidus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse264000000264falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of cash paid to acquire the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d falsefalse5false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.walmartstores.com/taxonomy/role/disclosurenote15acquisitionsinvestmentsanddisposalsbounteouscompanynarrativedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalseUSDtruefalse{wmt_PaymentTypeByAcquisitionAxis} : Additional consideration [Member] {us-gaap_BusinessAcquisitionAxis} : Bounteous Company Limited [Member] 2/28/2007 USD ($) $As_Of_2_28_2007http://www.sec.gov/CIK0000104169instant2007-02-28T00:00:000001-01-01T00:00:00falsefalseAdditional consideration [Member]wmt_PaymentTypeByAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_AdditionalConsiderationMemberwmt_PaymentTypeByAcquisitionAxisexplicitMemberfalsefalseBounteous Company Limited [Member]us-gaap_BusinessAcquisitionAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_BounteousCompanyLimitedMemberus-gaap_BusinessAcquisitionAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse6false0us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaidus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse376000000376falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryAmount of cash paid to acquire the entity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d falsefalse16Note 15. Acquisitions, Investments and Disposals (Bounteous Company Narrative) (Details) (Bounteous Company Limited [Member], USD $)MillionsUnKnownUnKnownUnKnowntruetrue