2.2.0.25falsefalse41702 - Disclosure - Note 17. Subsequent Events (Annual Dividend Record Date and Payable Date) (Details)truefalsefalse1falsefalsefalsefalse11/1/2011 - 1/31/2012
Duration_11_1_2011_To_1_31_2012http://www.sec.gov/CIK0000104169duration2011-11-01T00:00:002012-01-31T00:00:002falsefalsefalsefalse8/1/2011 - 10/31/2011
Duration_8_1_2011_To_10_31_2011http://www.sec.gov/CIK0000104169duration2011-08-01T00:00:002011-10-31T00:00:003falsefalsefalsefalse5/1/2011 - 7/31/2011
Duration_5_1_2011_To_7_31_2011http://www.sec.gov/CIK0000104169duration2011-05-01T00:00:002011-07-31T00:00:004falsefalsefalsefalse2/1/2011 - 4/30/2011
Duration_2_1_2011_To_4_30_20112http://www.sec.gov/CIK0000104169duration2011-02-01T00:00:002011-04-30T00:00:002true0wmt_SubsequentEventsAbstractwmtfalsenadurationsubsequent events [abstract]falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3falsefalsefalse00falsefalsefalsefalsefalse4falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringsubsequent events [abstract]falsefalse3false0us-gaap_DividendsPayableDateOfRecordDayMonthAndYearus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse002011-12-092011-12-09falsefalsetruefalsefalse2falsefalsefalse002011-08-122011-08-12falsefalsetruefalsefalse3falsefalsefalse002011-05-132011-05-13falsefalsetruefalsefalse4falsefalsefalse002011-03-112011-03-11falsefalsetruefalsefalseOtherxbrli:dateItemTypedateThe date as of when a holder must own the stock to be entitled to the dividend. The ex-dividend date is generally 3 days before the record date.No authoritative reference available.falsefalse4false0us-gaap_DividendsPayableDateToBePaidDayMonthAndYearus-gaaptruenainstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse002012-01-03falsefalsetruefalsefalse2falsefalsefalse002011-09-06falsefalsetruefalsefalse3falsefalsefalse002011-06-06falsefalsetruefalsefalse4falsefalsefalse002011-04-04falsefalsetruefalsefalseOtherxbrli:dateItemTypedateThe day, month, and year (YYYY-MM-DD) that the dividend declared as of or prior to the financial reporting date will be paid in the subsequent period.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 32
falsefalse43Note 17. Subsequent Events (Annual Dividend Record Date and Payable Date) (Details)UnKnownUnKnownUnKnownUnKnownfalsetrue
