2.4.0.8405030 - Disclosure - Loans and Allowance for Credit Losses, Allowance for Credit Losses (Details)truefalseIn Millions, unless otherwise specifiedfalse1falseUSDfalsefalse$FROM_Apr01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2falseUSDfalsefalse$FROM_Apr01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-04-01T00:00:002012-06-30T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3falseUSDfalsefalse$FROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000072971duration2013-01-01T00:00:002013-06-30T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4falseUSDfalsefalse$FROM_Jan01_2012_TO_Jun30_2012http://www.sec.gov/CIK0000072971duration2012-01-01T00:00:002012-06-30T00:00:00PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5falseUSDfalsefalse$AS_OF_Dec31_2012http://www.sec.gov/CIK0000072971instant2012-12-31T00:00:000001-01-01T00:00:00USDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse1719300000017193USD$falsetruefalse2truefalsefalse1912900000019129USD$falsetruefalse3truefalsefalse1747700000017477USD$falsetruefalse4truefalsefalse1966800000019668USD$falsetruefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524
false23false5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse652000000652USD$falsefalsefalse2truefalsefalse18000000001800USD$falsefalsefalse3truefalsefalse18710000001871USD$falsefalsefalse4truefalsefalse37950000003795USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Paragraph 168, 169, 170
-IssueDate 2006-05-01
-Chapter 5
-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.
false24false5wfc_FinancingReceivableAllowanceForCreditLossesDecreaseForPassageOfTimeOnCertainImpairedLoanswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-73000000-73USD$falsefalsefalse2truefalsefalse-82000000-82USD$falsefalsefalse3truefalsefalse-146000000-146USD$falsefalsefalse4truefalsefalse-169000000-169USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCertain impaired loans have a valuation allowance determined by discounting expected cash flows as the respective loan's effective interest rate. Accordingly, the valuation for these impaired loans reduces with the passage of time and that reduction is recognized as interest income.No definition available.false25false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1669000000-1669USD$falsefalsefalse2truefalsefalse-2689000000-2689USD$falsefalsefalse3truefalsefalse-3530000000-3530USD$falsefalsefalse4truefalsefalse-5569000000-5569USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryReflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Subparagraph d
-Article 9
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 114
-Paragraph 20
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
false26false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse517000000517USD$falsefalsefalse2truefalsefalse489000000489USD$falsefalsefalse3truefalsefalse959000000959USD$falsefalsefalse4truefalsefalse974000000974USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryTotal of recoveries of amounts due the Entity that had previously been written off as uncollectible using allowances (the valuation accounts that are netted against the cost of an asset to value it at its carrying value) and total of reestablishments of reserves (liabilities established to represent expected future costs) that had previously been utilized.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690
false27false5wfc_FinancingReceivableAllowanceForCreditLossesNetWriteOffswfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1152000000-1152USD$falsefalsefalse2truefalsefalse-2200000000-2200USD$falsefalsefalse3truefalsefalse-2571000000-2571USD$falsefalsefalse4truefalsefalse-4595000000-4595USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryReflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities, net of collections.No definition available.false28false5wfc_FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecreasewfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse-2000000-2USD$falsefalsefalse2truefalsefalse-1000000-1USD$falsefalsefalse3truefalsefalse-13000000-13USD$falsefalsefalse4truefalsefalse-53000000-53USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther increase (decrease) to the allowance for credit losses, including allowances related to business combinations and other.No definition available.false29false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse1661800000016618USD$falsefalsefalse2truefalsefalse1864600000018646USD$falsefalsefalse3truefalsefalse1661800000016618USD$falsefalsefalse4truefalsefalse1864600000018646USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryA valuation allowance for financing receivables that are expected to be uncollectible.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524
false210false5us-gaap_LoansAndLeasesReceivableAllowanceus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1614400000016144USD$falsefalsefalse2truefalsefalse1832000000018320USD$falsefalsefalse3truefalsefalse1614400000016144USD$falsefalsefalse4truefalsefalse1832000000018320USD$falsefalsefalse5truefalsefalse1706000000017060USD$falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.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 SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 7
-Subparagraph d
-Article 9
Reference 3: 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.
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 8, 9
-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.
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher OTS
-Name Federal Regulation (FR)
-Number Title 12
-Section 563c.102
-Paragraph 8
-Subparagraph a(ii)
-Chapter V
-Subsection I
-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.
Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 6
-Section L
-Subsection 1
false211false5wfc_AllowanceForUnfundedCreditCommitmentswfc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse474000000474USD$falsefalsefalse2truefalsefalse326000000326USD$falsefalsefalse3truefalsefalse474000000474USD$falsefalsefalse4truefalsefalse326000000326USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe allowance for unfunded commitments represent the reserve to cover probable credit losses related to unfunded credit commitments.No definition available.false212false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1661800000016618USD$falsefalsefalse2truefalsefalse1864600000018646USD$falsefalsefalse3truefalsefalse1661800000016618USD$falsefalsefalse4truefalsefalse1864600000018646USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false213false5wfc_NetLoanChargeOffsAnnualizedAsPercentageOfAverageLoanswfc_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.00580.0058falsefalsefalse2truetruefalse0.01150.0115falsefalsefalse3truetruefalse0.00650.0065falsefalsefalse4truetruefalse0.01200.0120falsefalsefalse5falsefalsefalse00falsefalsefalsenum:percentItemTypepureNet loan charge offs annualized as a percentage of average total loans.No definition available.false014false5wfc_AllowanceForLoanLossesAsPercentageOfLoanswfc_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truetruefalse0.02010.0201falsefalsefalse2truetruefalse0.02360.0236falsefalsefalse3truetruefalse0.02010.0201falsefalsefalse4truetruefalse0.02360.0236falsefalsefalse5falsefalsefalse00falsefalsefalsenum:percentItemTypepureAllowance for loan losses as a percentage of total loans.No definition available.false015false5wfc_AllowanceForCreditLossesAsPercentageOfLoanswfc_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truetruefalse0.02070.0207falsefalsefalse2truetruefalse0.02410.0241falsefalsefalse3truetruefalse0.02070.0207falsefalsefalse4truetruefalse0.02410.0241falsefalsefalse5falsefalsefalse00falsefalsefalsenum:percentItemTypepureAllowance for credit losses as a percentage of total loans.No definition available.false016false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_CommercialPortfolioSegmentMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseTotal Commercial [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialPortfolioSegmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse017true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse018false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse57860000005786USD$falsefalsefalse2truefalsefalse61300000006130USD$falsefalsefalse3truefalsefalse57140000005714USD$falsefalsefalse4truefalsefalse63580000006358USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false219false5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse172000000172USD$falsefalsefalse2truefalsefalse410000000410USD$falsefalsefalse3truefalsefalse364000000364USD$falsefalsefalse4truefalsefalse598000000598USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Paragraph 168, 169, 170
-IssueDate 2006-05-01
-Chapter 5
-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.
false220false5wfc_FinancingReceivableAllowanceForCreditLossesDecreaseForPassageOfTimeOnCertainImpairedLoanswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-16000000-16USD$falsefalsefalse2truefalsefalse-23000000-23USD$falsefalsefalse3truefalsefalse-35000000-35USD$falsefalsefalse4truefalsefalse-54000000-54USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.false221false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-272000000-272USD$falsefalsefalse2truefalsefalse-556000000-556USD$falsefalsefalse3truefalsefalse-532000000-532USD$falsefalsefalse4truefalsefalse-1114000000-1114USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false222false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse228000000228USD$falsefalsefalse2truefalsefalse198000000198USD$falsefalsefalse3truefalsefalse398000000398USD$falsefalsefalse4truefalsefalse371000000371USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false223false5wfc_FinancingReceivableAllowanceForCreditLossesNetWriteOffswfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-44000000-44USD$falsefalsefalse2truefalsefalse-358000000-358USD$falsefalsefalse3truefalsefalse-134000000-134USD$falsefalsefalse4truefalsefalse-743000000-743USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.false224false5wfc_FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecreasewfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse-2000000-2USD$falsefalsefalse2truefalsefalse00USD$falsefalsefalse3truefalsefalse-13000000-13USD$falsefalsefalse4truefalsefalse00USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther increase (decrease) to the allowance for credit losses, including allowances related to business combinations and other.No definition available.false225false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse58960000005896USD$falsefalsefalse2truefalsefalse61590000006159USD$falsefalsefalse3truefalsefalse58960000005896USD$falsefalsefalse4truefalsefalse61590000006159USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false226false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse58960000005896USD$falsefalsefalse2truefalsefalse61590000006159USD$falsefalsefalse3truefalsefalse58960000005896USD$falsefalsefalse4truefalsefalse61590000006159USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false227false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse10falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_CommercialLoanMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercial and Industrial Loans [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialLoanMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse028true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse029false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-184000000-184USD$falsefalsefalse2truefalsefalse-360000000-360USD$falsefalsefalse3truefalsefalse-365000000-365USD$falsefalsefalse4truefalsefalse-719000000-719USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false230false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse107000000107USD$falsefalsefalse2truefalsefalse111000000111USD$falsefalsefalse3truefalsefalse195000000195USD$falsefalsefalse4truefalsefalse214000000214USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false231false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse14falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_CommercialRealEstateOtherReceivableMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercial Real Estate Mortgage [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateOtherReceivableMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse032true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse033false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-49000000-49USD$falsefalsefalse2truefalsefalse-114000000-114USD$falsefalsefalse3truefalsefalse-109000000-109USD$falsefalsefalse4truefalsefalse-196000000-196USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false234false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse5400000054USD$falsefalsefalse2truefalsefalse3300000033USD$falsefalsefalse3truefalsefalse8500000085USD$falsefalsefalse4truefalsefalse6900000069USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false235false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse18falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_CommercialRealEstateConstructionFinancingReceivableMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercial Real Estate Construction [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CommercialRealEstateConstructionFinancingReceivableMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse036true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse037false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-7000000-7USD$falsefalsefalse2truefalsefalse-60000000-60USD$falsefalsefalse3truefalsefalse-12000000-12USD$falsefalsefalse4truefalsefalse-140000000-140USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false238false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse5200000052USD$falsefalsefalse2truefalsefalse4300000043USD$falsefalsefalse3truefalsefalse9100000091USD$falsefalsefalse4truefalsefalse5600000056USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false239false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse22falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_FinanceLeasesFinancingReceivableMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseLease Financing [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FinanceLeasesFinancingReceivableMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse040true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse041false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-24000000-24USD$falsefalsefalse2truefalsefalse-5000000-5USD$falsefalsefalse3truefalsefalse-27000000-27USD$falsefalsefalse4truefalsefalse-13000000-13USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false242false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse60000006USD$falsefalsefalse2truefalsefalse50000005USD$falsefalsefalse3truefalsefalse1000000010USD$falsefalsefalse4truefalsefalse1100000011USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false243false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse26falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_ForeignLoansMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseForeign Loans [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldiwfc_ForeignLoansMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse044true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse045false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-8000000-8USD$falsefalsefalse2truefalsefalse-17000000-17USD$falsefalsefalse3truefalsefalse-19000000-19USD$falsefalsefalse4truefalsefalse-46000000-46USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false246false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse90000009USD$falsefalsefalse2truefalsefalse60000006USD$falsefalsefalse3truefalsefalse1700000017USD$falsefalsefalse4truefalsefalse2100000021USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false247false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse30falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_ConsumerPortfolioSegmentMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseTotal Consumer [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerPortfolioSegmentMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse048true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse049false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabel1truefalsefalse1140700000011407USD$falsefalsefalse2truefalsefalse1299900000012999USD$falsefalsefalse3truefalsefalse1176300000011763USD$falsefalsefalse4truefalsefalse1331000000013310USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false250false5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse480000000480USD$falsefalsefalse2truefalsefalse13900000001390USD$falsefalsefalse3truefalsefalse15070000001507USD$falsefalsefalse4truefalsefalse31970000003197USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 11
-Article 9
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Audit and Accounting Guide (AAG)
-Number AAG-DEP
-Paragraph 168, 169, 170
-IssueDate 2006-05-01
-Chapter 5
-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.
false251false5wfc_FinancingReceivableAllowanceForCreditLossesDecreaseForPassageOfTimeOnCertainImpairedLoanswfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-57000000-57USD$falsefalsefalse2truefalsefalse-59000000-59USD$falsefalsefalse3truefalsefalse-111000000-111USD$falsefalsefalse4truefalsefalse-115000000-115USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.false252false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1397000000-1397USD$falsefalsefalse2truefalsefalse-2133000000-2133USD$falsefalsefalse3truefalsefalse-2998000000-2998USD$falsefalsefalse4truefalsefalse-4455000000-4455USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false253false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse289000000289USD$falsefalsefalse2truefalsefalse291000000291USD$falsefalsefalse3truefalsefalse561000000561USD$falsefalsefalse4truefalsefalse603000000603USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false254false5wfc_FinancingReceivableAllowanceForCreditLossesNetWriteOffswfc_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-1108000000-1108USD$falsefalsefalse2truefalsefalse-1842000000-1842USD$falsefalsefalse3truefalsefalse-2437000000-2437USD$falsefalsefalse4truefalsefalse-3852000000-3852USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.false255false5wfc_FinancingReceivableAllowanceForCreditLossesOtherIncreaseDecreasewfc_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse00USD$falsefalsefalse2truefalsefalse-1000000-1USD$falsefalsefalse3truefalsefalse00USD$falsefalsefalse4truefalsefalse-53000000-53USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryOther increase (decrease) to the allowance for credit losses, including allowances related to business combinations and other.No definition available.false256false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsetruefalseperiodEndLabel1truefalsefalse1072200000010722USD$falsefalsefalse2truefalsefalse1248700000012487USD$falsefalsefalse3truefalsefalse1072200000010722USD$falsefalsefalse4truefalsefalse1248700000012487USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false257false5us-gaap_FinancingReceivableAllowanceForCreditLossesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse1072200000010722USD$falsefalsefalse2truefalsefalse1248700000012487USD$falsefalsefalse3truefalsefalse1072200000010722USD$falsefalsefalse4truefalsefalse1248700000012487USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false258false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse34falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_FirstMortgageMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseReal estate 1-4 family first mortgage [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_FirstMortgageMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse059true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse060false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-392000000-392USD$falsefalsefalse2truefalsefalse-772000000-772USD$falsefalsefalse3truefalsefalse-867000000-867USD$falsefalsefalse4truefalsefalse-1600000000-1600USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false261false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse6400000064USD$falsefalsefalse2truefalsefalse2900000029USD$falsefalsefalse3truefalsefalse110000000110USD$falsefalsefalse4truefalsefalse6600000066USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false262false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse38falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_SecondMortgageMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseReal estate 1-4 family junior lien mortgage [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_SecondMortgageMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse063true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse064false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-428000000-428USD$falsefalsefalse2truefalsefalse-757000000-757USD$falsefalsefalse3truefalsefalse-942000000-942USD$falsefalsefalse4truefalsefalse-1577000000-1577USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false265false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse6900000069USD$falsefalsefalse2truefalsefalse6800000068USD$falsefalsefalse3truefalsefalse134000000134USD$falsefalsefalse4truefalsefalse125000000125USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false266false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse42falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_CreditCardReceivablesMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCredit Card [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_CreditCardReceivablesMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse067true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse068false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-266000000-266USD$falsefalsefalse2truefalsefalse-286000000-286USD$falsefalsefalse3truefalsefalse-532000000-532USD$falsefalsefalse4truefalsefalse-587000000-587USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false269false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse3200000032USD$falsefalsefalse2truefalsefalse4600000046USD$falsefalsefalse3truefalsefalse6300000063USD$falsefalsefalse4truefalsefalse105000000105USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false270false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse46falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_ConsumerLoansAutoFinancingReceivableMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseAutomobile [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerLoansAutoFinancingReceivableMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse071true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse072false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-126000000-126USD$falsefalsefalse2truefalsefalse-131000000-131USD$falsefalsefalse3truefalsefalse-290000000-290USD$falsefalsefalse4truefalsefalse-310000000-310USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false273false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse8400000084USD$falsefalsefalse2truefalsefalse103000000103USD$falsefalsefalse3truefalsefalse172000000172USD$falsefalsefalse4truefalsefalse208000000208USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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
false274false0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse50falseUSDtruefalse$FROM_Apr01_2013_TO_Jun30_2013_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_ConsumerLoanMemberhttp://www.sec.gov/CIK0000072971duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseOther revolving credit and installment [Member]us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_ConsumerLoanMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDollarStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse075true4us-gaap_FinancingReceivableAllowanceForCreditLossesRollForwardus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse076false5us-gaap_AllowanceForLoanAndLeaseLossesWriteOffsus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-185000000-185USD$falsefalsefalse2truefalsefalse-187000000-187USD$falsefalsefalse3truefalsefalse-367000000-367USD$falsefalsefalse4truefalsefalse-381000000-381USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli: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.
false277false5us-gaap_ValuationAllowancesAndReservesRecoveriesus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse4000000040USD$falsetruefalse2truefalsefalse4500000045USD$falsetruefalse3truefalsefalse8200000082USD$falsetruefalse4truefalsefalse9900000099USD$falsetruefalse5falsefalsefalse00falsefalsefalsexbrli: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
false2falseLoans and Allowance for Credit Losses, Allowance for Credit Losses (Details) (USD $)MillionsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://wellsfargo.com/role/DisclosureLoansAndAllowanceForCreditLossesAllowanceForCreditLossesDetails577
