2.4.0.8405040 - Disclosure - Loans and Allowance for Credit Losses, Allowance for Credit Losses by Category (Details)truefalseIn Millions, unless otherwise specifiedfalse1false USDfalsefalse$FROM_Apr01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$FROM_Apr01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-04-01T00:00:002012-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$FROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$FROM_Jan01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-01-01T00:00:002012-06-30T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse1719300000017193USD$falsetruefalse2truefalsefalse1912900000019129USD$falsetruefalse3truefalsefalse1747700000017477USD$falsetruefalse4truefalsefalse1966800000019668USD$falsetruefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false23false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse652000000652USD$falsefalsefalse2truefalsefalse18000000001800USD$falsefalsefalse3truefalsefalse18710000001871USD$falsefalsefalse4truefalsefalse37950000003795USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. 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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false24false 5wfc_FinancingReceivableAllowanceForCreditLossesDecreaseForPassageOfTimeOnCertainImpairedLoanswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-73000000-73USD$falsefalsefalse2truefalsefalse-82000000-82USD$falsefalsefalse3truefalsefalse-146000000-146USD$falsefalsefalse4truefalsefalse-169000000-169USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCertain impaired loans have a valuation allowance determined by discounting expected cash flows as the respective loan's effective interest rate. 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financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false213false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse172000000172USD$falsefalsefalse2truefalsefalse410000000410USD$falsefalsefalse3truefalsefalse364000000364USD$falsefalsefalse4truefalsefalse598000000598USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name 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This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false224false 5wfc_FinancingReceivableAllowanceForCreditLossesDecreaseForPassageOfTimeOnCertainImpairedLoanswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-57000000-57USD$falsefalsefalse2truefalsefalse-59000000-59USD$falsefalsefalse3truefalsefalse-111000000-111USD$falsefalsefalse4truefalsefalse-115000000-115USD$falsefalsefalsexbrli:monetaryItemTypemonetaryCertain impaired loans have a valuation allowance determined by discounting expected cash flows as the respective loan's effective interest rate. Accordingly, the valuation for these impaired loans reduces with the passage of time and that reduction is recognized as interest income.No definition available.false225false 5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1397000000-1397USD$falsefalsefalse2truefalsefalse-2133000000-2133USD$falsefalsefalse3truefalsefalse-2998000000-2998USD$falsefalsefalse4truefalsefalse-4455000000-4455USD$falsefalsefalsexbrli:monetaryItemTypemonetaryReflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. false226false 5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse289000000289USD$falsefalsefalse2truefalsefalse291000000291USD$falsefalsefalse3truefalsefalse561000000561USD$falsefalsefalse4truefalsefalse603000000603USD$falsefalsefalsexbrli:monetaryItemTypemonetaryTotal of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 false227false 5wfc_FinancingReceivableAllowanceForCreditLossesNetWriteOffswfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1108000000-1108USD$falsefalsefalse2truefalsefalse-1842000000-1842USD$falsefalsefalse3truefalsefalse-2437000000-2437USD$falsefalsefalse4truefalsefalse-3852000000-3852USD$falsefalsefalsexbrli:monetaryItemTypemonetaryReflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities, net of collections.No definition available.false228false 5wfc_FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecreasewfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00USD$falsefalsefalse2truefalsefalse-1000000-1USD$falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse-53000000-53USD$falsefalsefalsexbrli:monetaryItemTypemonetaryOther increase (decrease) to the allowance for credit losses, including allowances related to business combinations and other.No definition available.false229false 5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse1072200000010722USD$falsetruefalse2truefalsefalse1248700000012487USD$falsetruefalse3truefalsefalse1072200000010722USD$falsetruefalse4truefalsefalse1248700000012487USD$falsetruefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2falseLoans and Allowance for Credit Losses, Allowance for Credit Losses by Category (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wellsfargo.com/role/LoansAndAllowanceForCreditLossesAllowanceForCreditLossesByCategoryDetails429