2.2.0.25truefalse41601 - Disclosure - Note 16. Segments (Narrative) (Details)truefalsefalse1falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2010 - 1/31/2011 USD ($) $Duration_2_1_2010_To_1_31_2011244http://www.sec.gov/CIK0000104169duration2010-02-01T00:00:002011-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2009 - 1/31/2010 USD ($) $Duration_2_1_2009_To_1_31_20104http://www.sec.gov/CIK0000104169duration2009-02-01T00:00:002010-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2008 - 1/31/2009 USD ($) $Duration_2_1_2008_To_1_31_200945http://www.sec.gov/CIK0000104169duration2008-02-01T00:00:002009-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.walmartstores.com/taxonomy/role/disclosurenote16segmentsnarrativedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse1falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2010 - 1/31/2011 USD ($) $Duration_2_1_2010_To_1_31_2011244http://www.sec.gov/CIK0000104169duration2010-02-01T00:00:002011-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2009 - 1/31/2010 USD ($) $Duration_2_1_2009_To_1_31_20104http://www.sec.gov/CIK0000104169duration2009-02-01T00:00:002010-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart U.S. [Member] 2/1/2008 - 1/31/2009 USD ($) $Duration_2_1_2008_To_1_31_200945http://www.sec.gov/CIK0000104169duration2008-02-01T00:00:002009-01-31T00:00:00falsefalseWalmart U.S. [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartUSMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse2false0wmt_LongLivedAssetsNetExcludingGoodwillAndOtherAssetsAndDeferredChargeswmtfalsedebitinstantLong-lived assets, net excluding goodwill and other assets and deferred chargesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse7360000000073600000000falsetruefalsefalsefalse2truefalsefalse7070000000070700000000falsetruefalsefalsefalse3truefalsefalse6850000000068500000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryLong-lived assets, net excluding goodwill and other assets and deferred chargesNo authoritative reference available.falsefalse3false0wmt_CashAdditionsToLongLivedAssetswmtfalsedebitdurationCash additions to long-lived assetsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse87000000008700000000falsefalsefalsefalsefalse2truefalsefalse82000000008200000000falsefalsefalsefalsefalse3truefalsefalse75000000007500000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash additions to long-lived assetsNo authoritative reference available.falsefalse4false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.walmartstores.com/taxonomy/role/disclosurenote16segmentsnarrativedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart International [Member] 2/1/2010 - 1/31/2011 USD ($) $Duration_2_1_2010_To_1_31_2011243http://www.sec.gov/CIK0000104169duration2010-02-01T00:00:002011-01-31T00:00:00falsefalseWalmart International [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartInternationalMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart International [Member] 2/1/2009 - 1/31/2010 USD ($) $Duration_2_1_2009_To_1_31_20105http://www.sec.gov/CIK0000104169duration2009-02-01T00:00:002010-01-31T00:00:00falsefalseWalmart International [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartInternationalMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : Walmart International [Member] 2/1/2008 - 1/31/2009 USD ($) $Duration_2_1_2008_To_1_31_200944http://www.sec.gov/CIK0000104169duration2008-02-01T00:00:002009-01-31T00:00:00falsefalseWalmart International [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_WalmartInternationalMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse5false0wmt_LongLivedAssetsNetExcludingGoodwillAndOtherAssetsAndDeferredChargeswmtfalsedebitinstantLong-lived assets, net excluding goodwill and other assets and deferred chargesfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse3430000000034300000000falsefalsefalsefalsefalse2truefalsefalse3170000000031700000000falsefalsefalsefalsefalse3truefalsefalse2720000000027200000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryLong-lived assets, net excluding goodwill and other assets and deferred chargesNo authoritative reference available.falsefalse6false0wmt_CashAdditionsToLongLivedAssetswmtfalsedebitdurationCash additions to long-lived assetsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse40000000004000000000falsefalsefalsefalsefalse2truefalsefalse40000000004000000000falsefalsefalsefalsefalse3truefalsefalse40000000004000000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCash additions to long-lived assetsNo authoritative reference available.falsefalse7false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.walmartstores.com/taxonomy/role/disclosurenote16segmentsnarrativedetails1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse7falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : ASDA [Member] 2/1/2010 - 1/31/2011 USD ($) $Duration_2_1_2010_To_1_31_201122342http://www.sec.gov/CIK0000104169duration2010-02-01T00:00:002011-01-31T00:00:00falsefalseASDA [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_AsdaMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : ASDA [Member] 2/1/2009 - 1/31/2010 USD ($) $Duration_2_1_2009_To_1_31_201064http://www.sec.gov/CIK0000104169duration2009-02-01T00:00:002010-01-31T00:00:00falsefalseASDA [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_AsdaMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9falsefalseUSDtruefalse{us-gaap_SegmentReportingInformationBySegmentAxis} : ASDA [Member] 2/1/2008 - 1/31/2009 USD ($) $Duration_2_1_2008_To_1_31_200924http://www.sec.gov/CIK0000104169duration2008-02-01T00:00:002009-01-31T00:00:00falsefalseASDA [Member]us-gaap_SegmentReportingInformationBySegmentAxisxbrldihttp://xbrl.org/2006/xbrldiwmt_AsdaMemberus-gaap_SegmentReportingInformationBySegmentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalse8false0us-gaap_SegmentReportingSegmentRevenueus-gaaptruecreditdurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsefalse3180000000031800000000falsefalsefalsefalsefalse2truefalsefalse3120000000031200000000falsefalsefalsefalsefalse3truefalsefalse3400000000034000000000falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryTotal revenues for reportable segments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 32 -Subparagraph a falsefalse9false0us-gaap_TranslationAdjustmentFunctionalToReportingCurrencyNetOfTaxPeriodIncreaseDecreaseus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse-502000000-502000000falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryCurrent period translation adjustment resulting from translating foreign currency financial statements into the reporting currency. Adjustment shall not be included in determining net income, but shall be reported in other comprehensive income.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 23, 24, 25 falsefalse10false0wmt_AsdaLongLivedAssetswmtfalsedebitinstantASDA Long-Lived Assetsfalsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsefalse1190000000011900000000falsetruefalsefalsefalse2truefalsefalse1220000000012200000000falsetruefalsefalsefalse3truefalsefalse1080000000010800000000falsetruefalsefalsefalseMonetaryxbrli:monetaryItemTypemonetaryASDA Long-Lived AssetsNo authoritative reference available.falsefalse310Note 16. Segments (Narrative) (Details) (USD $)NoRoundingUnKnownUnKnownUnKnownfalsetrue