2.4.0.8408050 - Disclosure - Mortgage Banking Activities, Liability for Mortgage Loan Repurchase Losses (Details)truefalseIn Millions, unless otherwise specifiedfalse1falseUSDfalsefalse$FROM_Apr01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falseUSDfalsefalse$FROM_Apr01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-04-01T00:00:002012-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falseUSDfalsefalse$FROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falseUSDfalsefalse$FROM_Jan01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-01-01T00:00:002012-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true2wfc_LiabilityForMortgageLoanRepurchaseLossesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false3wfc_LiabilityForMortgageLoanRepurchaseLosseswfc_falsecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse23170000002317USD$falsetruefalse2truefalsefalse14440000001444USD$falsetruefalse3truefalsefalse22060000002206USD$falsetruefalse4truefalsefalse13260000001326USD$falsetruefalsexbrli:monetaryItemTypemonetaryLiability for mortgage loan repurchase losses.No definition available.false23true3wfc_ProvisionForRepurchaseLossesAbstractwfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse04false4wfc_LiabilityForMortgageLoanRepurchaseLossesAdditionsSaleswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4000000040falsefalsefalse2truefalsefalse7200000072falsefalsefalse3truefalsefalse9900000099falsefalsefalse4truefalsefalse134000000134falsefalsefalsexbrli:monetaryItemTypemonetaryIncreases to the liability for mortgage loan repurchase losses due to sales of loans.No definition available.false25false4wfc_LiabilityForMortgageLoanRepurchaseLossesAdditionsChangeInEstimatePrimarilyDueToCreditDeteriorationwfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse2500000025falsefalsefalse2truefalsefalse597000000597falsefalsefalse3truefalsefalse275000000275falsefalsefalse4truefalsefalse965000000965falsefalsefalsexbrli:monetaryItemTypemonetaryIncreases to the liability for mortgage loan repurchase losses due to credit deterioration.No definition available.false26false4wfc_LiabilityForMortgageLoanRepurchaseLossesAdditionswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse6500000065falsefalsefalse2truefalsefalse669000000669falsefalsefalse3truefalsefalse374000000374falsefalsefalse4truefalsefalse10990000001099falsefalsefalsexbrli:monetaryItemTypemonetaryTotal increases to the liability for mortgage loan repurchase losses.No definition available.true27false3wfc_LiabilityForMortgageLoanRepurchaseLossesReductionsLosseswfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-160000000-160falsefalsefalse2truefalsefalse-349000000-349falsefalsefalse3truefalsefalse-358000000-358falsefalsefalse4truefalsefalse-661000000-661falsefalsefalsexbrli:monetaryItemTypemonetaryDecreases to the liability for mortgage loan repurchase losses due to losses incurred.No definition available.false28false3wfc_LiabilityForMortgageLoanRepurchaseLosseswfc_falsecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse22220000002222USD$falsetruefalse2truefalsefalse17640000001764USD$falsetruefalse3truefalsefalse22220000002222USD$falsetruefalse4truefalsefalse17640000001764USD$falsetruefalsexbrli:monetaryItemTypemonetaryLiability for mortgage loan repurchase losses.No definition available.false2falseMortgage Banking Activities, Liability for Mortgage Loan Repurchase Losses (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wellsfargo.com/role/DisclosureMortgageBankingActivitiesLiabilityForMortgageLoanRepurchaseLossesDetails48
